@mr-peanut !

I hope you dealt with that problem already and if not then I would recommend browsing this site. People usually call for pest controllers or use traps to deal with the infestation by themselves. The last option is viable, but as mentioned above, rats and mice are quite intelligent species and a simple glue trap is usually not enough. Pepper and spray dust combined with sonic repellents should definitely help with a moderate rat infestation.