Another Vodacom ****

Following many difficulties in resolving various problems, I was offered a ‘gift’ of R100 airtime for each of my two sim cards, however, the "gift" erased over R2000 of my existing airtime. I’m not sure if this was on purpose, but despite calls Vodacom and spending hours visiting one of their outlets, no-one has been able to assist me at all. I am an 80 year old pensioner & I cannot afford to lose this money, but I am at my wits end as to what I can do.