The reason they want you to cancel is so that PayPal will release the money they have on hold. When you dispute, PayPal locks the funds up to the amount of the transaction. If you cancel the dispute, Indo will get the money released, tell you to **** off, and you'll be out $1500 with no hope of getting it back. PayPal will NOT let you dispute it again.
If you cancel the dispute, you can kiss your **** goodbye.
Do NOT listen to Indo... these are the people who have lied to you over and over and over and over and.... why would you take their word for ANYthing?
Seriously, keep us informed as to what's going on, and ESPECIALLY keep those emails with Indo to fwd to Paypal... especially them trying to pressure you to cancel the dispute. That will go a long ways towards winning your PayPal dispute. If you win, you get your money back. Indo is out NOTHING if you win. They only refund your purchase price and go back to business as usual. If they happen to convince you to cancel, they get to keep your $1500 and they know you have no way to collect from them, ergo, your equipment will never arrive.
Dude, seriously, listen to the people here who have been scammed in the past... do NOT cancel your dispute!