They cannot take away your .com away if you have it for a longer time. Trademark does not give companies a free pass to take away your domain name, especially w

They cannot take away your .com away if you have it for a longer time. Trademark does not give companies a free pass to take away your domain name, especially when their company was not existing when you've registered your domain name. It's not how this works. Trademark is a kind of protection, a company name alone, registering a domain name (all without trademark) is also a kind of claim and protection. Trademarks work for the future and not into the past, especially not into a past where the company registering the trademark was not existing! I would completely ignore what they demand.