Insulted customer

Today I have received such an insulting email from Mr D telling me that they have investigated last complaint and found that I always complain and demand compensation from them! Let me just say I have been a loyal customer for years now furthermore why do you have a complaint service available if it's wrong to complain and if they did their investigations properly they would see that I don't ever ask for compensation if anything I always said it's not about the lousy R25 or R30 that they give me back for orders R300 and over like really that just covers my delivery lol. And besides that I have to send proof via photos of the bad food or services received so basically they are saying that it doesn't matter that the restaurant gives poorly packaged food or food that's inedible as long as we don't complain then we are good customers? From today I will give my orders to Uber eats instead they value their customers and acknowledge them that is what we deserve!.