OK, no problem, I understand.
Without the information requested in my first/previous response, I can only give you a general answer, but I hope this helps.
I am afraid, this indicates an issue with the oven temperature sensor (thermostat) that is faulty and will need replacement.
When this is faulty oven suffers from uneven cooking or will not heat at all.
As this is a gas appliance, it is recommended that repair is carried out by gas safe engineer.
My goal is to provide you with excellent service.
If you have any follow-up questions, please do not hesitate to ask!
I hope you enjoyed your experience with justanswer.com today.
It has been a pleasure to assist you, have a wonderful day.