Failed to refund Walmart for $1800. so i have created a return slip which says drop off at your local fedex or usps So i dropped the return at local USPS office which is close to me and they gave me a lengthy tracking number(like 30numbers) but it is not trackable. but on the Walmart return slip there is a FedEx tracking number which just says "return created" and no more tracking does anyone faced this kind of problem?