Signed up and charged for a contract i did not agree to!

Totally disappointed! A customer for over 17 years with more than 3 contracts at a time signed up. Last upgrade done incorrectly and being debited almost 3 times more than agreed contract upgrade monthly fee. Battling for over 3 months nownto resolve the issue with NO concrete soultion in sight. This goes on whilst i continue to be debited and loose my hard earned money... ****************. Just being pushed from pillar to post and many many calls made for help. MTN has lost my support. Be careful customers ! Check what you are being charged and debited for.