Payment Made, lancet hasn't allocated payment to my account

I recieved an invoice for lancet and paid it in Jan, the mistake i made was i rounded up the amount an lancet has been harassing me, even after i shared my bank statement that an amount of 380 was paid into thier account and also contacted a guy who promised that he will ensure the money will be allocated, and we received an email that the account has been handed over, even though a payment has been made

I am struggling to understand why the payment has not yet been allocated and resolved from Lancet’s side.

Kindly investigate this matter urgently and revert back to us with feedback.

Regards,