Call centre - can't get through

My Topup contract on my husbands cell number is about to expire in 30 days and we do not want to renew it. The only way to cancel it is through the call centre 111. Even if we go in the vodashop they tell us to phone 111. I would like to place on record that we have tried numerous times in the last few days to get through to the 111 number to cancel the contract. Yesterday we finally got through to the call centre and the contracts department had already closed. Today my husband cannot get through and has to do his job rather than sit in the call centre queue for hours. I can't sit for hours on the phone to try and do it as it has to be the contract holder that does the cancellation.<br> Should we be unable to get through today, we will be under the 30 day notice period. It will be unacceptable for Vodacom to lock us into another 2 year contract under such circumstances.