Dissapointed by Poor Service

On the 19/3/2015 i settled my account with Shapiro Shaik for my MTN account that was handed over to them. i then sent my proof of payment and they confirmed the receipt. when i asked when can i receive the settlement letter, they said it will be after 21 days. after 21days no one called and i never received the settlement letter as well. i then called and spoke with a lady she said she said she is waiting for the response from the client (MTN) when i asked how long is she going to wait she said she doesnt know, she can only wait and they cant call the client to do a follow up. I then had to call MTN (communicated with warren) myself and asked them if they received the payment and proop of payment and they said no. i sent them the the POP and they immediately responded and said they allocated the payment and he said he would send the communication to Shapiro. When i phoned Shapiro gain this morning i was told by innocentia again that i need to wait until i hear from them, they dont know how long. this has a negative effect on me because my name is still not cleared on vcredit beareu. Please assist. I am seriously dissapointed by such poor service.