Five months later, still no service!I

I have been reporting bad signal and absolutely no data service since OCTOBER 2014. With every call logged, I am promised a return call. That never happens! All I get are explanations about their processes, no interest at all in resolving the problem! Shocking, shocking, shocking! Everyone is very nice and polite on the phone, but no one actually does anything to resolve the problem! Service levels have never been this low!