Black&Decker Convection Oven and Air Fryer

Model:  T03215SSD

I purchased the same oven twice and both went within a year of purchase.  Very disappointed in the product.  The knobs were not connecting after 6 months for some reason.  We tried everything the first time I purchase to fix it, to no avail and purchased the same a second time.  The same exact problem happened after 5 months.  I am very disappointed in the product.  Does anyone else have the same problem.