Home loan payment not reflecting

I have recently bought a house, and set up my home loan for 3 payments per month. All the payment have been going off my cheque account, but not all the payments are reflecting in my home loan account.

I have been into the branch, on the 9th of December, to rectify the problem, and was assured that it will be fixed by the 17th of December 2021.

The issue has still not been resolved, after I went in again today, 22 December 2021.

I have not means of doing anything from my side and Standard Bank is not helping to resolve the issue.

What must I do? Who must I phone? When can I expect the problem to be resolved, as I am currently paying interest on the money that Standard Bank has not yet allocated to my account, and been told my account is in arrears.