No service at all, got my contact but cant use it

Cant get hold of anybody to sort out my contract, obviously already paying for the service but not getting anything, Got a 50 gig contract but cant use any data at all. after being on the phone for hours still no feedback, just costing me more money and time from last Friday the 09/10/1015 and app**** for the contract the 05/10/2015. Not the store or the helplines can help. the store doesn't even have a number to call. asked to put me through to a manager and waited and waited and eventually dropped the call.