Strange dodgy orders coming through via cc and order failed

HI

My client all of a sudden is getting these dodgy orders through the shopping cart. Actually processed orders through Woocommerce, but Orders say FAILED because of CC

He may get 7 per day they are all orders trying to use a credit card. We receive notification Order # has failed. When I view it they all says Credit card payment method.

It has different person’s name and address BUT has a similar email format [email protected] and then this email changes for each order placed but similar email format but person’s name has changed etc. Phone number doesn’t exist either.

I have never had this issue with any client sites before so not sure best way to tackle it.

When I look at the orders, the IP address is different and changes also. But they are definately NOT legit orders.

I suppose I could try and block each IP address but they keep changing.

WordPress is latest version, all plugins are already updated so no issues there.

If someone could advise HOW I should tackle and resolve this please?

Thanks