If you lose connection with the game during your free spins, in most cases, the spins are still completed in the background. The associated winnings will be credited to your balance in bonus money approximately 30-45 minutes after the spins were claimed.
If the above has not happened on your account, you can try reloading the game in question and you may find the free spins are waiting to be claimed.
Another solution is to try claiming your free spins on a different device and/or browser.
If you have still been unable to claim your spins, please get in touch so we can investigate this further for you.