STME.xyz review: Stop them from attacking my account

I have no clue who this company is but they are trying to get money out of my account. I buy things online with my PayPal account but this is somehow attacking my personal account. What do I do. I have no phone number for this company to call. If I could get a phone number or an email address I would contact them myself.

I am a disabled elderly woman who lives on a fixed income so I don't have money for companies to steal.

Help me please.