See a consumer protection attorney as such threats are illegal.

Consult with an experienced consumer attorney as you may have a case against the collection company.

Yes you can. You may also have a separate claim for the bounced check.

Fees as to what? Please Re post your question with more details.

Defend the case and at the same time negotiate a settlement at a reduced amount and payment plan.

Consult with other attorneys before you hire a new attorney. You may have to pay another retainer and then seek a refund of the past retainer.

Yes. And if you can prove he knew it would be fraud.

Contact a consumer protection attorney is you may have a lawsuit against them. Consult with an experienced attorney.

It is risky not answering. Your best course of action may be to contact the opposing attorney and work out a settlement.

You need to see an experienced personal injury attorney right away.