This kind of thing often happens in Shenzhen. I was cheated when I first came to Shenzhen. Many people posted cards and advertisements at the door saying that the gas of XX company is a regular company. I made a phone call. Because the gas is sealed with transparent glue, it smells like gas when it is near, and making a phone call is like quarreling. Later, I checked online and found that I bought fake black gas. It was really a loss at that time. It's no use using it. I paid 6544. Tens of dollars of gas costs were all wasted. I found it according to the address on the card. Since there is no such place, I finally called 1 14 to ask the regular company to know that I was cheated!
Your situation may be the same as mine.
But it doesn't rule out that their service is really poor. If the company is listed as they say, I suggest you go to the door to talk about it and ask them to refund the money. If they dare not do so, call the news hotline and let them advertise for free. . . . .
If it is found to be fake black gas, call the police decisively!
You can also complain to the gas group!