Double billed

Received a phonecall from Vodacom telling me how great customer I am being a customer non-stop for 20 years. They offered me a data contract for R199 for 5GB, complete with router included, no charge. I asked them twice if there is any Admin or Connection fees. Twice they responded NO ADMIN OR CONNECTION FEES. Guess what, they charged me Connection fees. To top it all they even charged me DOUBLE for the month. Went to the nearest VODACOM branch - could not help me. Logged a complain without any response. This is leaving me with a bit of sour taste in the mouth. Hope VODACOM reads this and sort it out.