I once worked in retail (apparel) where it is very common for manufacturers to grant individual companies exclusive wholesale rights to entire markets, i.e. a country, multiple countries, or sometimes even continents. Any other company would have to go through these wholesalers to purchase products. Anyways, whenever we came across a wholesaler that didn't have their act together - refusal to sell products, having cheaper prices for their own retail arm, unfair terms, etc - we would make a formal complain to the manufacturer and let them know why their products were doing so poorly on the market. More often than not, we ended up with getting wholesaler rights, making us completely independent. Similarly, if your competitors can show that you are damaging their sales with anti-competitive actions, they will be very quick to react, even going so far to remove your exclusive rights.