To stop the roulette, it is enough to exit the game and then log in again.
The bet is accepted and funds are debited when you press the Spin button. Even if the wheel spins non-stop, the program will withdraw money from the user account for only one spin.
Such a situation can be caused by various reasons:
synchronisation failure between the gaming site and a remote server;
poor internet connection on a PC or a gadget;
technical malfunctions of the personal device.
In any case, there is no need to panic. Licensed casinos work honestly and uphold their reputation. Any problem will be instantly fixed so that users can continue to enjoy exciting gameplay.