vodacom businees fiber

I really don't know what vodacom taken their client for....I requested them to assist me with canceling their service due to non service after i also paid a huge amount of money they have been billing me and now they went awol on me nobody is giving me feedback...is the best way to go to their head office maybe they will take me serious at this stage....pls vodacom do what you have to do before i come to your office