Account paid in full but not allocated to account

I have paid my outstanding account in full by 15 November 2025. I paid it into a public beneficiary ‘Builders Debtors Account’. I have been consistenly harassed for payment. I have emailed and whatsapped all the pop’s as well as the listed beneficiary detail to RCS. But no one is getting back to me… it has been more than 2 months. Being desparate to sort this out I have also spoken to Shameel twice during the last 2 weeks in Collection. NO FEEDBACK. I have received a letter that I am in breach of contract but not ONE person on 3 different platforms that I have contacted has assisted me in getting my payments allocated to my acount. What is the next port of call if they have onky one number?