*********ly charged me for items returned 5 months ago.

Mondo **** to me about a router./ data.., contract, when I found out I canceled it, but they still deducted money. It is almost 5 months since they *********ly charged me, still I don't have my money back. They are extremely dishonest and enetjical. Please warn everyone that Mondo is a "trap" in my humble opinion. I called them several times in 5 months but nothing. Can they be black listed?