MTN don't care about customers

I'm getting MTN Zone broadcast messages, my phone has to be on silent at all times as the MTN Zone broadcast messages is read out load I don't know why I have loads of different reference numbers where MTN confirmed that it has been removed from my line but still I'm getting it. This morning once again I phoned MTN to ask about this I've been informed that some of the reference numbers is still open nothing has been done to it others is no longer reflecting MTN as told me that I should use *175*0# but on this USSD code I'm not subscribed MTN does not want to stop sending me this MTN refuses to assist MTN can't not even give me the proo where I give them permission to send me the adverti*****t message MTN just don't care