Do you have a PC? Download Electrum on
ELECTRUM.ORG (only legit website), optionally verify its signature by following
this guide and then restore your Mycelium wallet by following these steps:
1. When creating the Electrum wallet, choose: Standard Wallet -> I already have a seed -> Write your seed -> Click on "Options" -> Select "BIP39 seed" -> Next;
2. Select "legacy (p2pkh)" -> Next.
See if you see your balance in this new wallet. Also, please confirm me if you addresses start with a "1...", since I have not used Mycelium for some time so I don't know if it started supporting Segwit (addresses starting with bc1... or maybe starting with 3...)