I don't doubt that others have not had the same if not similar issue(s) with their infotainment systems. Suggest you give them a chance to reply?
As fellow posters have already stated, you need to take this up with the dealer you purchased the car from. It is their responsibility to remedy the issue. No ifs, no buts. It is what the law is there for. Whether you choose to exercise that law to assist you is entirely up to you. You state that the selling dealer is willing to help? Then I suggest you let them help...?