iOS 11.3 and 3rd party screens

I had the screen of my Apply iPhone 8Plus replaced at weFix Tygervalley in February. The cost was R5,000, the same as the cost of a genuine Apple screen, the reason I went to weFix was because they offered same day repair. On 13 April I updated to iOS 11.3 and immediately the touch screen stopped working. The reason apparently is that the update is not compatible with 3rd party screens. The only resolution weFix can offer is to wait for iOS 11.3.1. Surely if my screen is no longer working it should be covered by the warranty and I should be able to claim my money back so that I can get an Apple screen fitted, like this fellow sufferer posted? "i ended up having to send my phone in to apple and they had to replace my screen with an apple screen. it works fine now and i was without it only for a few days. the repair shop that i originally went to refunded my money since they had a 90 day guarantee on their repairs. so it was essentially a "break even" for me." I even see in a press release it is stated that "While weFix has not yet received news of any local screen incidences, its network of technicians continues to monitor the issue." - this is SERIOUSLY untrue since I reported it immediately and have been sending daily emails so there is at least one incidence!