Major issue with Trade Republic account

So I created a trade republic account about 2 weeks ago. A few days after, I added some funds that I wanted to use to buy some stocks. The issue is, whenever I tried to buy anything, wether a stock or a crypto currency, whenever I reached the last page and clicked buy, it showed me a screen asking me to add cash to my account. It never reads the cash that’s already there.
It gets worse because I can’t transfer the cash amount back to my bank account. Because of the account’s issue, you can safely assume that it’s not because my money is locked in any kind of investment.
I have contacted customer support but they all sound the same and say the same things. They finally managed to create a ticket after a few days. We’re now stuck on the ticket being in progress for a week. Whenever I try to get a status update, they say the same answers of “we have prioritized your ticket” which makes you wonder if they’re not telling the truth or if that’s how they really deal with their “prioritized” tickets.

Has anyone experienced anything similar?