State Bank Of India [SBI] — Fund not transfer through phonepe to actual

On 8th April I transferred a sum of Rs 10000 through phone pay from my A/c [protected] to my sister account, which was linked to phone pay through her mobile number .Soon After the process I received message that fund was transferred & even my sister also received message that the amount was credited.later when she checked her account the fund was not transferred to her account, instead the amount was credited to some other unknown account.

Hence we request to cancel this transaction and credit my amount back to my account.And also I had given a written request to the bank regarding this issue but I didn't receive any positive result.