I wouldn't recommend using EO anyway, since they are actively on Activisions radar and will probably get targeted again in a few month or so.
Try reaching out on Discord mate. Aimex staff is very supportive and can help you out there if you'll open a ticket. Otherwise, you can also use the forums support section.
Open a ticket on discord. You will be guided on how to pay with an alternative method.
Same answer as above. Only the staff will be able to assist you here.