I have also experienced the same thing as you have experienced, at first I was sincere if my coins were ultimately worthless and useless, but my friend told me that if old coins could be swapped into new coins, I also looked for this information through my official social media coin, like telegram and twitter , then finally I managed to do the swap.
But, honestly I have missed lots of swaps in my crypto life which include bitcoinwhite and streamity. I also holding PCL and JBN but these tokens swapping was auto process like they have sent new tokens to my ethereum addy itself hence I did not gone for any hassles (PCL asked me to follow some steps as it was about changing new contract addy).
When we are holding any token or coin then we must need to follow their dev teams through any of social media. These days twitter and telegram are most useful in this regard. Always watching the dev team will help not missing out any swap kind of news.