I have data but cannot use internet

I am in a Telkom coverage area, bought data instead of BIS and have come to regret it! I cannot use the internet, whatsapp to chat, have tried numerous times to call the centre but to no avail. They just tell me to reboot the phone which I have done more than 10 times. I can't believe I went to Telkom mobile after the problems I had with my landline, guess I didn't learn from that mistake but have learned from this one and leaving Telkom!! Tried to call the centre since yesterday but the line goes unanswered, my data expires on the 12/06/2015 and it seems this will be before I get to use it, I want my money back!!