Hey, thanks for playing the game and leaving a Review.
So for the Telephone you need to hold on the number you want to dial and turn it clockwise until it stops turning automaticaly. If you then let go and let it turn Back it should select the number. If you let go, before it stops turning on its own, there is a chance, that the wrong number is selected. To reset the dialed Number (e.g. if you made a mistake) you need to close the telephone and reopen it. Hope that helps :)
The Fridge Puzzle is not solvable until you can Travel through Time, so if the Phone Call didn't work, there is no way to get the cogwheel from the Fridge.