Think my account has been hacked

Just checked my  sports betting P and L for the last 3 months and this came up on screen :

American Football: £83.26 | Cricket: £14.21 | Football: £10.88 | Greyhound Racing: £89.95 | Horse Racing: £296.81 | Rugby League: £0.00  Total P&L:  £495.11

Clearly a hacker has got my login and is placing a considerable number of winning bets. Not only has he recovered all of my losses, he has got the account showing a profit for the first time ever.

If the hacker is reading this can I point out I use the same login and password with bet365.

Cheers.