I don't know why you rely on uber. There are lots of decent taxi companies in Mississauga at decent prices. I generally use Blue and white taxi (905-274-4444) as they have a phone number I know by heart, ever since I landed in Canada. All hotels have taxi cars near them. I live just across Novotel Hotel and there are always 2-5 or more cars every time. Trips within Mississauga can vary between $10-30-40, depending on distance. When I use taxis I pay $10-20, for 10-15 km. Uber is not legal in Mississauga, and I would never use a taxi that is not regulated (I am afraid, LOL). For going to the airport there is a special taxi Aerofleet (they are authorized), but you may come to the airport with any taxi, even by buss. But when you arrive to Toronto/Mississauga (Pearson Airport) you need to take a registered/authorized taxi (there are signs for that). Some guys may come to you and offer their services, but you should not accept it, or at least ask for the price before accepting. Taxis have a flat rate according to distance.
Please feel free to ask me any questions!
I prefer taxi's as well and Blue & White is my favourite. I've used an Uber once and the guy creeped me out so much... I had him drop me off at the wrong street so he didn't know where I lived