Bad services

So i was told when i called into wefix that they dont have stock of my screen cover i then said ok fine what now has id like the special that is currently running(free screen cover with repair) and that ends on Sunday 7 the guy then told me i can book my phone in but still take my phone with me the guy said so i will still get the free screen i arrived at the waterfront wefix and was told no i cant book mu phone in and there is nothing they can do when the special end i then said tell how is it that wefix doesn't have stock my problem.