Bitcoin.com is a website related to an altcoin called Bitcoin Cash.
Unlike Bitcoin.org, I think that Bitcoin.com actually has a company behind it and it has support. https://support.bitcoin.com/en/
So my advice would be:
1. Ask the support there make your wallet work again.
2. Find out if you have bitcoin in your wallet or bitcoin cash or similar altcoin.
2.1 if you have bitcoin, move your coins to a proper bitcoin wallet, maybe Electrum and make sure you save carefully your seed words, or, if it's a meaningful amount, consider buying a hardware wallet to be safe
2.2 if you have altcoins consider converting into bitcoin and follow step 2.1