[wombat-man]

You're not going to go from 0 to $8k in legal expenses that quickly.

See if you can find a lawyer that you can trust, ideally one who has experience with this kinda thing to give you an opinion.

A good lawyer will be frank about whether or not the cost to engage is worth it. Others are probably correct in saying there is probably an arbitration clause involved.

You might just find that a letter from a lawyer might lead Amazon to reconsider their decision to hold your funds.

Also I'd be wary of lawyers quoting you a flat fee like 8k to "take care of it". I had to deal with a completely different legal issue several years ago. Some lawyers gave an up front figure of like $5k-$9k or something. Ended up consulting with an attorney at an agreed hourly rate of ~$300/hr or something. Ended up using less than an hour of his actual time to consider the situation and give me legal advice. Ended up only paying a few hundred for the whole thing.