I am really sick of mtn horrible service delivery

I am really sick of mtn horrible service delivery, mtn sucks been begging them to update my ****en banking details since last year!!!!, till today that hasn't been done, yet i was told by one of their agents that it has been updated, till today it hasn't been done maybe they just want to **** up my credit profile i don't know please update my ****en banking details for the million time!!!!