VRoom dealerships TRADE-IN FRAUD Grand Prairie Texas

 I traded my Nissan Altima 2007 with Vroom 5/3/17. The paper work was completed and the paid off balance on the Altima was 500 dollars. The trade is for a 2014 BMW X3. The 2007 Altima had a balance of 5361. I was told by vroom the payments will be made prior to the trade because they have to get a title from alphera financial to trade the Nissan for the BMW. 2 days later they posted a payment to alphera financial and delivered the vehicle to me and too the Nissan Altima. Last week I received a call from a collection agency saying I own alphera financial 5361 and that no payment was made by vroom. Contacted vroom and left several messages but no results. I call alphera financial and they said the check they received was a personal check and that when they tried to cash it, it was returned back to vroom. Up till today I have not received a call from their financial department or anyone regarding the check and payment. I am currently in a panic and need help. If anyone read this and can help or offer advice please call or email me at (((REDACTED))) nadiatomas@yahoo.com Thank you.