PIC12F508 "Calibration value is invalid"
They appear to be operating out of a house in Brampton (a heavily ethnically Indian and South Asian area of the GTA). Their US address in Charlotte NC is also a house.  

Maybe they are counterfeits or possibly genuine Microchip devices sold at a discount, perhaps into Asian markets, that do not have osccal programmed- check the exact part number on the packaging and chips. I believe Microchip has some reduced cost variants that are sold only in Asia. 

Technoshack does not appear to be a franchised distributor. I suggest you contact the vendor (Technoshack) and ask some questions. They may have come by them through some other supplier. 

Then, if you don’t get resolution, go to Microchip and determine if the parts are genuine (and are full-spec), and if so if they meet your requirements or if there is a work-around. My recollection is that some parts were being sold as untested or partially tested into Asian markets for use in toys etc, at a fraction of the usual price. Of course the part numbers would be a bit different if Microchip supplied them.