If you still have the batch file or configuration file you used back when you were mining, confirm that the address does, in fact, match what your wallet client shows. If that is the case, I would try the "restore-deterministic-wallet" fix again and/or check an Electroneum block explorer with your view key.
Yes but as you know there were issues with electroneum and even afterwards people still had problems with the zero balance bug hence the restore-deterministic-wallet fix.
I may try downloading new wallet software in case there is an update and try again but it appears that the coins are lost, wont be using them again