Here is the output from the API for this payment:
array
(
[AUT_MY_CRF] => 42826785
[AUT_MY_MFO] => 320649
[AUT_MY_ACC] => UA233206490000026006052755441
[AUT_MY_NAM] => MMT+ TOV
[AUT_MY_MFO_NAME] => BRANCH "ROZRAH.TSENTR" JSC CB "PRIVATBANK"
[AUT_CNTR_CRF] => 14360570
[AUT_CNTR_MFO] => 305299
[AUT_CNTR_ACC] => UA623052990000029024866711649
[AUT_CNTR_NAM] => K7_Transaction account payments bp 3972647
[AUT_CNTR_MFO_NAME] => JSC CB "PRIVATBANK"
[BPL_CCY] => USD
[BPL_FL_REAL] => r
[BPL_FL_DC] => C
[BPL_PR_PR] => r
[BPL_DOC_TYP] => m
[BPL_NUM_DOC] => @2PL461559
[BPL_DAT_KL] => 01/27/2021
[BPL_DAT_OD] => 01/27/2021
[BPL_OSND] => Scorched Valentina Telyushchenko, 10179, Valentina Telyushchenko
[BPL_SUM] => 305.80
[BPL_SUM_E] => 305.80
[BPL_REF] => D2P6L0127A4M5X
[BPL_REFN] => P
[BPL_TIM_P] => 13:05
[DATE_TIME_DAT_OD_TIM_P] => 01/27/2021 13:05:00
[ID] => 1193564769
[TRANTYPE] => C
[TECHNICAL_TRANSACTION_ID] => 1193564769_online
)
The AUT_CNTR_CRF parameter is used as an external ID (because the actions indicate to search by an external ID), in fact, it finds your contact
https://mmtcrm.crm-onebox.com/admin/shop/users/6/Judging by the editing history of this contact - it was also created on the basis of a payment - apparently in the issue it was also indicated [AUT_CNTR_CRF] => 14360570 and [AUT_CNTR_NAM] => DOH FOR DT TRANSACTION UAH - as a name.
Actually what data came - based on their contact and created.