Not sure if their site is secure to buy from online

I bought batteries from them - that was fine, delivered etc. BUT - I used my bank card that I rarely use and after I used them online to buy from their site, I had three small purchases from AliExpress from my account... R30, R50 and then R80... Definitely ***** and I am sure it must have been GPBatteries' site that was not secure enough.

I mailed them to inform them - no reply.