Have you aslo contacted the bank about the fradulent transaction. I think the bank and tesco have a responsibility between them make sure that you don't end up out of pocket. Boring as it may seem - read the small print of your account details and the tesco website, they probably have soem sort of fraud guaretee type thingy.
As for teh police they do tend to take this sort of thing quite seriously even with small amounts of money. Even if its only £100 of your money - what if they have £100 of 10 other peoples - unless this is someone with a personal vendetta against you then its likely that they are doing it to other people too.
Good luck getting it back Let us know how it goes
As for teh police they do tend to take this sort of thing quite seriously even with small amounts of money. Even if its only £100 of your money - what if they have £100 of 10 other peoples - unless this is someone with a personal vendetta against you then its likely that they are doing it to other people too.
Good luck getting it back Let us know how it goes