Poor service at Mtn

My contract was not debited on it's day because I had no funds on the 12th of June I did a deposit on the outstanding amount...I sent them the proof of payment and my lines were reconnected 2 days later they were suspended I have been trying to get hold of them the said the matter has been escalated but I am not getting any feedback from them. ...They reconnect my services after 2 days gets suspended they are now suspended have been calling and writing to them Iam not getting any response it is now fustrating..