A few days after I bought my X3 Pro bike, Wallke EBike offered a "Black Friday" deal on a Dual Motor X3 Pro for the same price, $1299. I want a rebate on my single motor X3 Pro. I reported this offer to Wallke, and the marketing person lied and said there was no such offer. I have two emails from Wallke confirming this. Also, how/where can I buy a second battery pack for the X3 Pro?