Bad service and incompetance

I had an MTN account that was handed over to MBD, took forever for me to get the settlement amount from MBD CALL CENTRE CONSULTANTS. Finally i got the amount and I paid. I paid first few days of April. On the 10th of april i called to ask for the letter to say the account was settled. I spoke to Afeziwe, she told me it will take 7 days. i was supose to receive the letter before the 14th of Aprill. i called month end May i spoke to Blessing, He said he is putting the query through. i called Melisa on the 11 June 2015, she said she will put query through. called again on the 15th june 2015 Thula said the same thing putting the query through, on the orther had they say my email as sent 20th of May. till today the email is going door to door from JHB looking for lynette who is in durban and the email has not arrived. on the 19th i called again i was told i will get the email on monday the 22 june 2015 by Vuyi. today i call on the 23rd and spoke to Alison, she gave me the number to call head office, and i told her the number never gets answered, she said i should call there, I dd and i thought i will get a surprice but no, the number *** is always on voice mail when i call.