Well, that's why it's not a permanent ban.
Don't try and justify your cheating by blaming it on poor design. Yeah, they should have better tested it yadda yadda, but it was still an exploit and against ToS.
You did take a chance, and got caught. Now, either use this as a stepping stone and make a better choice next time, or trip over the same stumbling block and get closer to a perma ban.
No one is to blame but you.