Check out this article on “How smaller companies get bigger companies to pay in a timely fashion”. It’s a good article. However, much of it is a bit wishy-washy, as in, with the examples given, the companies are largely having mixed success. But there are still some good tips. If you are having similar issues, it’s definitely worth the read.
Here’s an excerpt from the article, Negotiating with Goliath: How smaller companies get bigger companies to pay in a timely fashion ‘ “Alternately, the company might try asking for better terms from suppliers. “If we have an opportunity with a large customer, we’ll go to suppliers and say, ‘We’re not getting paid for 60 or 90 days, so can we pay you in that time?'” Donargo says. That approach often works when the manufacturer wants to do more business with a certain end customer. If neither of those alternatives is viable, though, “we’re more likely to walk away from the deal.” ‘