No sound notifications when receiving new messages

When clients write to us (and in parallel, the operator can correspond with dozens of clients), the operator does not receive either an audio or visual message that a new message has arrived from the client. The operator is in correspondence with client 1, and at this time client 2 and client 9 are writing, and the operator does not know about this and skips their messages. Who has encountered such a problem? Our integrator has been unable to solve the problem for several months and says that the integration of the box and e-chat is not provided for, that new messages somehow manifest themselves and the operator does not let them through in a bunch of dialogues with clients. Any messenger (Viber, TG, WhatsApp, etc.) highlights unread messages in dialogs and you can immediately see who wrote what and you can quickly respond? Is this not possible in Box+Text? Is this the 19th century???? We need (we are ready to pay for the setup service): 1. When receiving a message in an ongoing dialogue with a client, the OKKC operator, while in dialogue with this client, no later than 15 seconds after receiving the message in the OKKC, must hear the sound of an incoming message 2. When receiving a message in an ongoing dialogue with a client, the operator should be in another browser window (in another program) and no later than 15 seconds after receiving the message in the OKKC, he should hear the sound of the incoming message. 3. When receiving a message in an ongoing dialogue with a client1 while in the OKKC in another dialogue with another client2, no later than 15 seconds after receiving the message, you must hear the sound of an incoming message 4. When receiving a message in the TG channel in an ongoing dialogue with the client (the operator is in the OKKC in the Viber channel), no later than 15 seconds after receiving the message, he must hear the sound of an incoming message. And vice versa, when the operator is in correspondence with the client in Viber and the client starts writing in the TG channel 5. When new messages arrive, the operator must see in the OKKC in which dialogue and in which dialogue channel (Viber or TG) the new message has arrived (the unread message sign is visually present until the operator goes inside the dialogue and communication channel) 6. When receiving a message in the TG channel in an ongoing dialogue with a client (the operator is in correspondence with this client in the OKKC in the Viber channel), no later than 15 seconds after receiving the message, he should see a visual sign that a new message has arrived in the TG channel. And vice versa, when the operator is in correspondence with the client in Viber and the client starts writing in the channel in TG (then the visual sign should appear in the TG channel). The appearance of a visual sign of a new message should be no later than 15 seconds after receiving the message in the OKKC 6. If the operator is in the OKKC in a dialogue with client 1, and a new message has arrived in the dialogue with client 2, then a visual sign of a "new message" noticeable to the operator should appear in the dialogue of client 2 (with a delay of no later than 15 seconds from the moment the message is received in the OKKC) 7. When a new message is received, a dialogue with a client should move up in the list of active dialogues with other clients (automatic sorting by the date of the last message in the dialogue is triggered, the sorting delay is no more than 15 seconds) 8. If the OKKC operator writes an outgoing message, there should be no sound when sending it. all the specified items should work without restarting the OKKC window contact number +972549562881