Business support is separate from the app via website, that’s a different team.
Unfortunately, waiting time is long right now. You can try Twitter / Facebook, that’s sometimes faster. Be aware that Monday is a bank holiday in the UK and social media is not monitored 24/7.
The best way to deal with support is to write them everything they need to solve your problem. Once an agent gets assigned to your case, they can solve it without getting back to you. This speeds things up.
Don’t worry. Money is never on a card with Revolut, it‘s on an account and then several cards can be attached to that account. So card termination does not affect funds at all. Send them all details and ask them to „un-terminate“ your card. They should be able to do that.