Lost black suitcase with a bright rainbow strap and unique cat sunglasses sticker, possibly left at Norwich bus station.

I lost my black suitcase with a bright rainbow strap while traveling on a bus to Norwich. I think I may have left it at the bus station on August 15th. It has some unique stickers on it, including one of a cat wearing sunglasses. If anyone has seen it, I would really appreciate your help in getting it back!