Transferring airtime

I have moved to the UK but left my Vodacom contract running.I wasn't prepared to pay for another 10 months of airtime up front that I would never use. Quite happy to pay the balance if my handset but they won't do that. So 4 months later I am looking atvtransferring most of theR750 airtime I have built up to my daughters to use, try to do on Saturday but get an error. Call customer care and get told there is an error an problem with my account because in haven't used the functionality in a number of years. They will log a call and it will be sorted by latest Monday. So this evening I put my Vodacom sim back in my phone. Message comes through. .... Problem fixed. Happy days. Login and get the same error. Call again. Customer care put me through to technical services who tell me I cant transfer any of my "own" airtime, only extra top up I have loaded. Why on earth would I load extra airtime if I don't live in SA anymore? I am doing the right thing by keeping up the payments on my account but at this stage I feel like closing my bank account and Vodacom can whistle for their money!