Rcs refund

I mistakenly deposited funds on 01 July 2020 via my banking app to RCS account, my RCS account did not reflect the amount deposited and reflected as arrears. I paid another in 13 July 2020. After calling RCS and emailing their refunds department they rep**** by saying that, to refund the 2nd payment on 23 July they need to trace the 1st payment and required a TARGET DETAILED BENEFICIARY STATEMENT from n bank. My bank told me a target statement was a normal bank statement which I sent to Rcs via email also. Still waiting to know from Rcs what they require.