score:5
It is very likely, and you often will not even find the car unless you call the driver, or they call you. I can't speak for Chongqing as I haven't been there in quite a while, but in Shenzhen and Beijing this is how Didi works; I doubt Chongqing would be any better, if not worse.
However, you could try and just explain to them in written Mandarin (i.e. texting) that you are a foreigner and would prefer texting. They'd usually be understanding.