There are many altcoins today, is there any way I can exchange them for free. Changelly charges a lot, other exchange services too. Most of the excahgnes do not have the token I want.
Any service that provides the same?
No services provides any kind of that service, how ? because to send out your altcoin, you even need a gas fee.
so why do you want a free of charge exchange service to achieve your aims ??