Declined payment – MyStake (10-04-2024)

For over a year I have withdrawn funds to my Nationwide bank account using SEPA bank transfer (IBAN ) which I get charged a small amount by my bank for conversion of Euro to GB pounds. Or more recently SEPA GB pounds withdrawal putting in my bank sort code & account number. This worked better for me as there was no currency conversion charge.
This has worked fine until this week. On submitting a SEPA bank transfer ( IBAN )withdrawal ( the SEPA GB pounds option was not available ) I was met with the following message.
‘Withdrawals are not available through the requested bank’
On contacting live chat and also emailing support@mystake I was pretty much told the same thing that….
The situation is not due to Mystake and would I use another means of withdrawal.
The only other options available to me are crypto currency withdrawals. I have never used crypto before and don’t really want to either.
I have a fairly large amount of money ( over £4,600 ) in my account which currently I cannot withdraw back to my bank account which is frustrating and also concerning.
I just want to be able to withdraw funds in the way I have done previously. Crypto currency is not something I am familiar with and as a result am somewhat nervous of using this means. Also as I have always deposited from my bank account, I would like to continue withdrawing to it as well.