If you were inactive for a long time, why would you keep thousands of dollars there? It seems a bit odd. But assuming you're telling the truth, do they have any other reasons to be suspicious (other than inactivity)? Do you still use the same email, have you got the same ip? Was your account verified before? Have you made any fiat deposits, or only btc/altcoins?
What you can do is:
1- send a pm to their official profile (looks active) https://bitcointalksearch.org/user/btc-ecom-33012 and ask for a reply.
2- start a proper scam accusation, following this format: https://bitcointalksearch.org/topic/scam-report-format-use-it-to-make-scam-reports-properly-260073 include any relevant correspondence logs with them (screenshots). If the accusation is convincing, maybe one or more trusted, DT-listed members will give them negative trust feedback, hopefully forcing them to address the issue.
3- take a legal action against them (if possible).
4- regularly keep emailing, posting in their official thread and social media until they respond.
Thanks for your reply, pawel7777. I never onde had any problems with them since 2012, and I've only traded there. I've used FIAT and BTC, and everything went smooth. Reason why I decided to keep my BTCs there is because I never tought I would have any "problems" with my account, always tought they were a legitimate business. But ever since my account was locked due to inactivity (so they say) I've been in a battle with them. I've changed my email before, and even tho my IP has changed, my current one is still on the same exact spot (location-wise) as my previous IPs. I've sent them my old IPs and past transactions to the exchanger for a checkup, as well as what BTC address I was using at the time.
Reason why they don't want to unlock my account is simply because they believe I photoshopped one of the documents (a wallet transaction, which I had no reason to do so). All I did was cut the parts on the screenshot that were not relevant to BTC-E (later on I sent them the original, untouched version).
Also sent them a copy of my passport and eletricity bill (yes, that's how ridiculous things have got).
Can't have a decent argument with them ever since. I even proposed to meet them offline.