spray not working

After purchasing 3 tins of Mr MIN in August 2020, I found that the first tin I tried has no gas. So there is no way of getting the spray out. I called customer service and was promised vouchers as compensation. After getting numerous emails from them, I was told that the delay has been caused by Covid. The first email I got from Reckitt Benkiser was in September 2020. 'Jaako' advised me that my vouchers would be sent shortly. Now when I tried to use my 3rd tin of Mr MIN, I find that I am sitting with the same issue as the first. So buy 3 only use 1! Time to try another product...