✔ 最佳答案
The best way to answer your questions are based on each individual issue.
1. LTD Debts
In short - you are wrong. A director needs not to be responsible for debts of a LTD .
The exact detail depends on how the loan is originated. But, if A borrowed the money in the name of the LTD , the LTD is the sole entity liable for the debt. The only way to recover is to liquidate the LTD.
Collection companies profit from recovered debts (as they bought debts from banks). So they will use whatever excuses to "encourage" repayment, even if they are false and incorrect. What tricky is they are not banks' agents (as the debts were sold to them). Banks are not liable for their misconduct.
Unfortunately, you will need a lawyer in this case. A "Cease-and-Desist" demand should be able to stop them from harassing you (personally). As they know they have no ground for collection, they will stop with a threat to sue.
2. LTD Exiting
You are again wrong by resigning. As a director, you hold certain legal responsibilities. So when a LTD fails to do so, the directors will be liable.
Even you resign as a director, the failure was during your directorship, you will still be liable.
The correct way is kicking A completely out by terminating A's directorship and acquiring A's share in a nominal value ($1). Then making all necessary obligations and dissolving the LTD (absorption, liquidation, etc.)
I don't think A will argue on the price selling the share (as A can be sued for the misconduct).
3. Lawsuit
Without any detail, it is difficult to comment.
Default judgment is a win on procedure. Courts are preferred to resolve cases by merit. If you have compelling reasons showing A's failure as a director, with a competent lawyer, you may be able to vacate the default judgment against the company.
Once the judgment is vacated, you may be able to work out a deal with the client.