Fnb refuse to port me back to vodacom

I ported to fnb and I can't use the data coz of the bad signal. Many times people say my phone is off or I can hardly hear them.. The network it's night mare. My business is suffering a lot coz as a lawyer I need to communicate with clients and do a lot of research.. But to I do this with poor network.. Now I want to port back Voda come I'm told to wait 3 months.. I would have lost money and clients by then.. I'm reporting this matter to ICasa. I'm even thinking of moving all my accounts to another bank.