Mtn poor customer service

Had a personal mtn account for a few years, was time for an upgrade so I asked my boss if I could change my account from personal to business so I can get the benefits of a business contract and he agreed, so we get to the mtn store at Bluff center and I explain to the consultant that I want to change from personal to business in order to get the benefits of a business contract,he acknowledged my intentions, so I found a suitable contract upgrade and we started with the paper work,for about a month we were up n down with paperwork eventually he says everything is gone through, end of December I get my bill, 12th of Jan I got the same benefits as my personal account, I queried it with the consultant and he said it will take some time to go through, eventually he stopped taking my calls, he left mtn bluff, can't get hold of him, 4 months later I find out they just changed my account from personal to business, so I contact the store and they say they going to try to help me but it doesn't seem like it's possible to change according to them as I have already upgraded, phone the call center, they say they can't help, they said I must email mtn complaints, go to mtn complains as they have that section where you enter your details and type your complaint, did all that get to the submit button which I click about 100 flippin times and it's not dam going through!!!!!