Newbie here

If it was basil from a supermarket, they never last long. The growers massively overseed the pots so you can have 50 or more plants per small pot. Unless you split the rootball and put them into bigger pots, they don't survive for long, because they want you to go to the supermarket to buy another one.

Thank you that makes sense. I wonder how successful it is to try and grow from seeds, I could give it a go, wish me luck