So, last Wednesday at work I had a call to my mobile. Didn't know the number, answered anyway, said he was from 02. He was looking to give me a better deal on my account. I hung up and he called back. He said again he wanted to offer me a better deal on my monthly account. I laughed and said but I'm payg. He said that's OK, can't offer any reduction there and hung up. I have since googled the number and yes it is a scam. Today I was putting a top up in from my debit card, normal card, everything the same, but it wouldn't accept the details. I hung up and tried again, this time it worked, but in the background of the call I could here like another phone tone, just the once while I was inputting the details. I've checked my account and all is fine. But I find the whole thing strange. Just to say my phone is really old, like 20 years old possibly and has been giving a few minor niggles.
Would you worry and cancel the card just in case or am I panicking over nothing.