My name is ***** ***** unlikely the seal at fault, its most likely the sensor which checks the door is closed, worn out brushes on the motor or an issue with the drive belt.
Do you get any lights flashing on the display when the drum doesnt spin, can you also advise if the dryer start to heat up?
I will opt out as I am not prepared to provide assistance based on someone looking to self fix, when they dont know where to find basic components, the risk if injury is to great, I urge you to get an engineer to resolve this fault for you, as its clearly hardware related, and your not equipped to repair it yourself.
Can you take the top off?
A pleasure if you need further help come back to me. Enjoy your evening ~ Ian