The only option is to continue to contact them until they assist you with your problem. There are several threads posted here before and an affiliate (not sure if that's the owner) is answering the queries, you could send a private message to
Freewallet account and see if you could get help.
I've always seen this wallet when searching for erc20 token wallet but i ignore it because mostly they are recommend to use is mew wallet which is very safe and until now not having any issue yet..
Do you have any private key backup or seed phrase? if ever you wanted to recover it you can recover your wallet in mew or imtoken..
Freewallet doesn't provide the private keys for individual wallets so users have no control over it, that's why it is not much of a good choice imo.