BROKEN TIMER INDESIT K645VG?

I have an Indesit K645VG oven- gas hob, electric oven.
I mistakenly turned on oven timer knob (instead of oven knob!) this stopped the oven working. I turned the timer back off and oven worked for a day.
Now oven will not work again, I have tuned timer knob back but still the oven does not work- to exasperate matters the markings around the timer have eraser- over cleaning!
Gas hob works and fuses on main plug ok.
Is this fixable?
Thank you for your time