Tracking is six of one half a dozen of the other.
Would the cost of tracking everything you sell (or even just the freight forwarded items) be greater than your losses to the complaints.?
Keep in mind that the complaining buyers may actually be right and they have not received their purchases at the time of the complaint. Just as you can't confirm delivery, you can't confirm non-delivery.
The other part of these freight forwarded sales is that you are paying a higher payment processing fee for them. Domestic (US) sales are charged at 2,9% while overseas sales are 4.4%.
One way out of the situation, if you don't mind having the sales, is to use eBay's own Global Shipping Program, which allows you to ship, with tracking, to their plant in Kentucky, after which most of the Money Back Guarantee disappears for the buyer, particularly the INR and 'stuck in customs' scams.
