Did the transaction went through with confirmations?
If it did, I will assume that the address format starts with "1"; if it is the new type "q" addresses, the transaction cannot be generated at all.

Anyways, in case that it starts with 1, you need to export the private key of that particular address and import it in a Bitcoin TrCash wallet like Electron Cash.
But Mycelium doesn't have such option, you need to manually generate it using other tools like https://iancoleman.io/bip39/.

But I'm afraid I cannot help you further with this since I'm not familiar with Bitcoin cash seed tools.
You can move this to Mycelium child-board for more accurate support.