Breach of contract

I have a cellc contract with autopage cellular for a Samsung tablet with 3gigs data p/m.Since May there hasn't been data and I have been back and forth with autopage who keep giving different reasons to the problem but no solution. I have been to Samsung who said tablet has no faults. Autopage advised me last that cell c has recently done a test in my residential area which has network coverage and that I need to do a sim swop which was done but still no internet.Im paying every month for a service that's not provided for 6 months, is this not a breach of contract?