Corel Painter 2018 installation stuck at downloading, please wait


I just bought a new wacom intuos pro & received corel painter 2018 free with it. The salesperson sent me a link to download & a product activation key. I started the installation after downloading from the link and the installation box came. It stood at 0% complete (downloading, please wait) even after 6 hours. I checked the data usage tab & saw it has downloaded files around 3 gb in this 6 hours!! I'm using a dell desktop with windows 10 64 bit.

I would be really grateful if anyone can help me with this.