Rental payment allocated incorrectly

I received my monthly statement in November stating that I owe 2 months rent of which was not true, my rent is paid up to date every month I contacted the IHS offices and spoke to Onica,Liesl ,etc. with regards to this of which I figured out they game me wrong reference numbers on the statement to pay my rent, the reference number was for the previous Unit G 0153 I rented up until June last year. I moved to Unit G0142 after continuous complaints with regards to cracked ceiling. Both these ladies mentioned that they will sort this query on my rent. Then I received a new mail again from David stating that I will be listed on the credit bureau if I don't pay my arrears called him and provided proof of payment for October and November and he informed liesl to transfer the credit flying on the one unit to my new unit. I received a print out via email stating the credit has been allocated. On the 27th of December I receive a new statement from Pieter Van Der Merwe stating I owe 3 months rent. I am so irritated by this being on holiday in Cape Town and having this stress about being evicted by the time we get home, I want this too be sorted immediately. Bad customer service ever.