No one helping with ***** refund

***** was committed 3 times on my line in the last 2 years. The last one was when I asked for a data line that expired based on the sms I got to go on a month to month contract only to find out it couldn't be cancelled end of November as the person moved it to another 24 month contract. I didn't even use the data since August. I have been talking to several people at Vodacom since 2nd January when I find out about it and still it hasn't been resolved. I refused to pay my bill until this is sorted. I have been a loyal customer for over 10 years and still is the treatment I get. I spoke to a manager names Nosi who was very helpful but she keeps on failing to call me back. My news bill is due this week. Please can this be sorted!!!!