eBay hold payments for a number of reasons; commonly:
Registration holds: We may hold payouts if we identify a discrepancy with the information you provided at registration. If your account is restricted, we'll notify you by email with a request for additional information.
Performance holds: We hold your payouts if we identify unusual activity associated with your account, such as increased customer claims, a sudden change in your selling activity, late deliveries, or negative buyer feedback
Invalid payment method: We may put your payouts on hold if we can't deduct your selling fees and other costs from any of your on-file payment methods. In this case, you’ll need to add another payment method.
Compliance holds: We maintain policies and procedures to protect buyers and sellers while complying with applicable laws. If your account has a payout hold or restriction for compliance reasons, we'll notify you by email and may request additional information from you.
The most recent compliance hold on laws is to meet eBay's due diligence requirements in collecting National Insurance Numbers. "...... 'withdraw' is no longer available on either account" - suggests you have more than one eBay account; have you been asked to provide your NINO. If so have you supplied it? The requirement to report your sales is on a cumulative amount across accounts; not on individual accounts.
If you haven't been asked for your NINO or have already supplied it I would suggest that you contact eBay via a call-back between 8am and 9am when it is more likely to be responded to by an Irish customer service agent who are more familiar with the legal requirements of eBay UK members and will probably pursue your queries more effectively.
