My parent have 2 cards.
When our internet was disconected for no reason, NTL told us if we want it back we had to pay reconnecting fee £50. So my parent gave them a credit card number to pay that £50. They didnt reconnect the internet straight away. Then NTL said to stop this happening again, pay your monthly fees through credit card....(we payed through cheque). My parent gave them a different credit card for monthly fees.......this happened back December/January. (A month without internet then)
Guess what they did last month???........well NTL took £25 from two cards, (including the first one which was used to pay just £50 reconnecting fee). So they took £50 in total last month.