William Hill duplicate payment error

About five days ago, I suddenly received five transfers from William Hill around the same time — totaling roughly £2,000. But I haven’t made any deposits or used my account for about ten days.

I contacted their live chat right away, but they just told me there were no withdrawal records and asked me to check with my bank instead.

It seems quite possible that these are previous withdrawals that got sent to me again by mistake.

Should I contact William Hill to let them know? It’s been almost a week and they still haven’t noticed the error.
The money is still in my bank account, and if they reach out to me I'm happy to return it but I’m kind of just the passive party here and don’t really want to cause trouble.

many thanks