Ghosted by company

I bought a Typhoon camping stove from Alloutdoorandhome aka Lesandre Online. It has never worked properly. The flames are set extremely high and you can’t use the oven for anything. At first she gave us the manufacturer’s number but when they could not help us, she said we spoke to the wrong person. I insisted that she sort it out then as I purchased from her, not them. Then I received excuse after excuse until I asked for a return address to send it back for a refund. Now I get no response from then. I hate going this route, but we are pensioners, permanent campers and hate using a faulty gas appliance that reeks gas when you use it. I wish the manufacturers would get involved as I don’t know where or who to turn to next. update: she contacted me very quickly when she saw my post and now claim that she doesn’t carry the warranty herself, although that was never mentioned before. She will apparently put me into contact with the manufacturer as she said they claim it is in fine working order from our videos.