I purchased a Univa gas stove on the 22nd of August and it was delivered on the 24th of August

I purchased a Univa gas stove on the 22nd of August and it was delivered on the 24th of August. On the 21st of September, Gas Boys came to do the installation and noticed that the oven was not working. On the same day, I went to Game to report that the oven is not working and I was advised that a technician would be sent. The technician arrived on the 29th of September to assess the stove and found that the stove does not have a gas tap. He advised that they will order it and come back to install it. On the 14th of October the technician can back and he replaced the gas tap but still the oven was not working and he said to me he assumes that the connector block might be the problem and he will order it. I sent an *** to Game complaints and I keep on calling them they are telling me that my complaint was assigned to someone who is currently not at work and they will ask his line manager to contact me but they did not call me at all