Exasperated

I am continuously being overcharged on my account, for 'data usage' and numerous trips to my local MTN branch as well as many e mails trying to get this resolved has brought me nowhere (except having my line continuously disconnected). Not so much as a call or e-mail response from MTN. This been on going for two months now ! Please can someone contact me to resolve my dispute that I have with you. Otherwise thanks for the new phone and adios...