Not paying outstanding invoices

For the last 9 months PepsiCo Sasko is not paying their supplier invoices. After several emails and calls to Sasko to try and resolve the issue with no luck, I write this to warn any prospecting suppliers to not render any services or deliver anything to Sasko. Even with valid order numbers there are no answer from them to solve the issue at hand. This is an disgrace for an multi national company.