Package change

Having completed my previous Vodacom contract I changed package. On the last day of the previous contract I had no service, calls, data, sms, even though there had been a considerable balance of all three the day before. When I questioned this with their customer care call centre, I was told that this was normal practice? On the commencement of my new package, the following day, I noted that none of my existing balance had been carried over to the new package. The Package were different but the fact remains that I had paid for the calls, data, sms in my previous package’s contractual obligation, surely this is neither correct, legal or fair! The change was hardly seamless as advertised