FNB Connect terrible service - cannot port out?!?!

FNB connect has struggled to sort out my issues on my SIM card for over a week now where I was unable to receive calls, whatsapps and SMS's. I can now receive calls and SMS but cannot use data at all, either outgoing or incoming. I now want to port out to Vodacom only to be told this is not possible???? This is unacceptable as I cannot use my SIM with FNB and am not able to port out, so am stuck with a defective provider? How is this possible when other networks have been able to port for years? I have called the call centre daily to follow up and resolve the issue. A very painful exercise and really poor service