Onsitego — Warranty Service is a scam

The warranty service seems scam.
My experience and complaint below
Onsite service team reported that AC had gas leak. Gas team came next day and apparently did the fix and filled gas. This was paid and 90 day warranty was promised.
Gas leaked again a month after. This time again, fix was done and gas refilled.
Now the gas has leaked again, just slightly more than 90 days after the first visit, and I am being asked to pay up. I was told that the warranty is from the latest gas leak and not the first one, seriously, in business, the warrant says that the fix is done and it shouldn't cause any problem for next 90 days.
But now the customer care team is making conflicting statement, they are asking for payment.
Its not the customer problem that the "engineers" coming to fix and refill are not able to fix the leak. They just refill and leave making it someone's else's problem.
If this keeps on happening, I will have to pay the gas leak amount every 90 days, because the Onsite team is not capable of fixing the leak.