Adobe Lightroom Classic 2024 software is not licensed

I bought Adobe Lightroom Classic 2024 software on Sell-SA. After a month of using the software a popup message appeared notifying me the software is not licensed. I reached out to the seller and they assisted me a couple of times and got the software working. But, they never told me that I have to switch off my internet connection. Now i can only use the software with no internet. That sounds to me like a non legit software copy. They should either refund me or give me another license code.