It is your choice which bet to play with. However, there are exist situations when the game changes your bet.
The bet is automatically changed after:
you close the slot and return to the lobby;
after a bonus game or free spins, if the mission is ‘spin with Max Bet’ (in this case, the bet is set to the highest one).
Please note that if you get the Bonus Game that makes you leave the slot (closes the window with the slot and sends you to a new screen) the game resets the bet after you return to the slot.
If that happened to you accidentally, paw-lease feel free to contact us and we will do our best to assist you!