Pathetic service

The that we did install new phones with, were 5 years wit Nxatel. In December we ask for a settlement amount, (while we waiting almost 2 days for) we got one for monthly payment up to May (when your contract end) porting fee of R6000, admin fee of R4700 (bare in mind this when you want to keep the equipment) the amount came to R29000 something. I phone in once again and said that we do not want to keep the equipment and we only keep one number so now it is R3000 (porting) and R4700, that must come off from our settlement. We received another letter, and those 2 amounts was taken off. My settlement amount was then R16906.00 untill the 31 January 22, we then agree on this amount of R16906. They've send us the settlement invoice, and on that invoice the come down to R16456. so we settle the R16456 on the 20th January, the amount on the invoice whats been send by Orga (head of the account department). Now we can start porting, but we receive a statement just to tell us we owing them now R11332, what dehell is this for. When I phoned Nxatel, I got through to Orga, and he stated that it's for R3000 and the R4700, but only porting 1 number and we don't want the equipment. As I phoned everyday to ask to sort this out, they just made promises. THURSDAY 10/02 I phoned and spoke to Ciemal (don't know if it's the right spelling) he promise that all is cleared now, and that he is busy with the confirmation letter, so FRIDAY 11/02 I speak to Zaba and she also promise, when I phoned back after 12, Zaba had a family crisis (heard this from Carlos) and no one even answer the phone before when I tried to phone. So now I sit here with no letter, no phones because the number need to be ported. If we try to port the number, it stated that we in arreas, but bare in mind we pain the settlement invoice. Please help, this is absolute ridiculous.