Service Failure

I requested my line to be migrated from a 4Mb line to a 8Mb line on the 3rd ***A, i then followed up from my office number on the 9th, 10th and 11th. I had a number of interactions via your chat call centre and your voice call centre during this time. I then followed up on the 14th where i spoke to Sino, Promised she will sort this out i even wrote a nice compliment to her due to the effort she put in to solve the problem even promised to call me back, which she didn't. However no luck!!!! I called in the following day... Spoke to another person also promised me the world and promised to call me back and solve the problem. (Guess what) they didn't call and didnt solve the problem. Yesterday 17 March again spoke to an Ayanda again promised me the world with no luck. Every time i speak to your call centre since the 9th i was told 24 hours and the issue will be resolved. The first few times it was fun.... the word #HELLKOM came to mind a few times. Uselessness came to mind. Then this morning i insisted in speaking to a Manager my luck they gave me a supervisor who also just tells me that they can only escalate to the back-office.