DHGate.com – My account was suspended for no reason

I have been using the app for a week now, and I have placed 5 orders, and received none so far (which is okay because the delivery estimate is 3 weeks). However, as I was trying to place an order today, I was trying to use my credit card/debit card rather than Apple Pay. I was surprised to find that my account got restricted, and I was logged out, and unable to track my orders that I have already placed before! This is so unprofessional. I need an immediate response.