No Connectivity

I can't receive my emails, bbm or whatsapp message because I do not have data connectivity and every time I phone in (if I am lucky enough not to be cut of) their technical dept will reset or activate my APN. This will last for half an hour where I receive mails, etc. and then it will stop. I am paying for data I can't use and what's more frustrating is trying to get through to the call centre. Please resolve this issue!!