Sweetmax Recurring Charges

I am being charged weekly by a company listed on my Bank of America statement as “Sweetmax chang sha wan hk6” even though I do not recall ever authorizing a recurring subscription with this company. The charges started around 08/06 and have continued every week since then. I have tried to find and cancel this subscription, but I cannot even locate any related app or service on my phone or online accounts, so I have no way to stop the payments directly. I have also not yet been able to resolve this through my bank. I request that this unauthorized Sweetmax subscription be cancelled immediately and that all weekly recurring charges taken from my Bank of America account since it started be fully refunded.