Returning a Garment with an Issue

I bought a garment about a week before Rosh Hashanah through an online Orthodox store, and the garment did not arrive, so I decided to go to the store myself and pick up the garment. When I arrived at the store, I saw the garment in a different color and wanted to exchange it. They indeed allowed me to exchange it (provided that I pay and then they will credit me for the dress I bought online). While I was checking the exact size, I heard the saleswoman telling another customer who had paid that threads might come out of the garment. I heard this, but nevertheless, I was very close to the holiday and did not give it importance. I emphasize that they did not say this to me, but I heard it, and when I paid them online, I did not know about it at all. Indeed, after a short period, threads came out of the garment. I spoke with them, complained about the garment, and they told me that the saleswomen told everyone about the defect. I said that they did not tell me, and apparently, I bought online, and they credited me in the store. Now my question is whether I am really allowed to use the credit, or is it considered as if they told me at the purchase? I also add that they did not reduce the price, and I believe they received a refund from their supplier for the defect. Thank you.

Hello,

It was forbidden for you to say that you did not know about this defect, because in fact, you knew from what you heard.

However, if you precisely said 'they did not tell me', and based on that they gave you the refund, you can use the credit.

.