Very difficult to ship with FedEx

I wanted to use FedEx but your website does not work. First it refused to let me ship anything. Then I got in touch with customer service. They tired to help me but faced the same issues with the website. They then said I should create a new username but the website rejected that. Then they said I should start the registration process from scratch. I did. The the website rejected two different credit cards from two different banks when trying to add a payment method. The customer service agent then said he would help me manually on his side. However, when I tried to check if the items I want to ship are accepted by FedEx, I received contradictory information. So I do not know if I can or cannot ship those items, the same kinds of items I have shipped before with one of your competitors to the same destination. Is there someone at FedEx who would be able to sort this out? From tomorrow until next week Monday, it will not be possible to contact me. I have only this afternoon to be assisted.