Two weeks I bought shoes online, but they didn't fit, I still wore them for a week or so and even removed the label.

Then a few days ago I just wiped down the shoes with a wet piece of cloth and knotted the label to the shoes and sent them back. Today I got an email saying the return was successful and I get the money back, although on their site they write the products must be unused and with label to return them.

Did I do something immoral?