Poor Product support from Stevens & Co, Ryobi and Builder Express

I bought 2 x Ryobi Heat Guns from Builders Express in Newton Park on the 25 October 2018. Both of them stopped working within 4 months. Keeping in mind we were closed for a couple weeks over Christmas :-) We use them on average 20 minutes per day as part of our daily work. So, I took both back to Builders and they booked them in on the 21 Feb 2019 to go to Ryobi to be checked. I gave them my number and they promised to call me with feedback . Meegan from Builders never called. 3 Weeks ago I went to Builders Express to follow up and was shown a quote to repair my 4 month old items. The Box cleary states 2 Year Warranty on it. Apparently the warranty only cover factory faults, what about poor product design and manufacturing - 4 months of use on an items that should last a minimum of 24 months - this seems like a factory/Design issue to me. Maybe they are not designed to do 20 minutes per day - if so then it should say on the box!!!

It is now almost May and I still don't have a final repose from Stevens & Co!