Rear lights, number plate light and internal lights keep fusing

Rear lights, number plate light and internal lights keep fusing when the car is driven. A local garage has replaced the light clusters at the rear and the entire fuse box but this hasn’t resolved the problem, and I’ve now spent far too much money. When a new fuse is inserted the lights work but the fuse blows when it is driven. I’d be grateful if anyone has any suggestions please.