They have your pistol??
I'd be wondering if they lost it, or someone there "light fingered" it out the back door and took it home or sold it. Even a pony express rider could cross Canada in 5 months (after the spring came over from Europe on a boat, of course.)
There are lots of pistols out there for sale. However, most of them won't shoot with a CZ. I've got a bunch of the other brands in my safe, I know.
If I were you, I'd try to get the dealer/warranty shop to ship it back to you so you could check with another shop.
What you are going through is flat ass ridiculous.
Did that this spring with a big LG refrigerator/freezer. Fifteen days wait for the factory service techs to take their first look at it. Two months and one day till they finally showed up with the parts to fix it (part was warrantied, labor wasn't). Uncountable number of phone calls to the service techs and the LG Cust. Service folks. In the end, the LG folks were digging into the service techs (I figure that's why they called and wanted to come out and fix it on a Saturday afternoon).
No more LG products in this house. So I know how you feel. If you were in the US you could have sent it to CZ USA and had it back in 8 to 10 days (that's about how long it took me to get my P01 back when the tritium front sight went bad on me).
If I were you, I wouldn't bad mouth the CZ pistol, but I sure would let folks know not to trust the shop you sent yours back to for repairs.
Good luck with it