Putrid after service

I have taken out an access bond on my home loan. However whenever I add funds to me home loan account the monies never reflects what I have paid in. It either never reflects or the amount is different. I have to call in month after month to resolve this. When I do call in the go to reason is that interest is calculated daily and that is why there is a difference. Funny thing after I call in and have a tantrum the balance gets rectified the following day. I have asked to be contacted to resolve this but nothing more than empty promises. I was called once by a "team leader" who said she would get back to me still waiting to be contacted since end of April 2020. I have references numbers for the call I have made.