Shabby installer or product of poor quality? 4 yea...

Shabby installer or product of poor quality? 4 years ago I bought a Totem Fire corner insert and it's the worst investment of my life. No matter the wood used, the power of my draw, as soon as I make a fire is a smoke infection that escapes with a stench. The installer came 4 times to tell me that there is no problem with his installation. The insurance expert tells me that it is me who puts bad wood (I tried all the essences). In short as soon as I recovered financially from this toxic investment I change for a woodchip especially from another brand.
Once again I see that French craftsmanship is below everything.