Aire One (Aire One) Heating & Cooling

I bought new Furnace and AC from Air One 3 years ago and I've been filling Freon on a yearly basis. Last July, I paid Air One around 300$ to fix the leaking and re-fill it and guess what ? They just filled it without checking the leakage as they believe it will fix the problem. My AC is freezing again and i asked for a technician on May 14 and till now, all the calls i had with Jamie went in vain. The only answer is that a technician will knock my door in the next day or so with the condition that I have to pay another 300$. I believe their business model is based on re-filling Freon on a yearly basis.