Fund withdrawal non-execution/stuck

Hi. Is there a limit on the number of withdrawals per day or amount per withdrawal? I’ve been withdrawing several times earlier today before UK market close but my withdrawal didn’t get executed. It still hasn’t been. Because of the live chat feature being unavailable, it’s a bit of a mess. Need the money on Friday and taking into account (upto) 3 days for withdrawal, I was hoping to get it done today. How long does it take for withdrawal to get executed? Didn’t have any issue even after market close yesterday. Any idea if withdrawals tomorrow will reach my bank account by Friday?