Contract Breach Dispute Resolution Needed

We're in a dispute with a supplier over breach of contract terms. They failed to deliver goods on the agreed timeline, causing us significant business disruption. We've sent correspondence but they're disputing liability and we're at an impasse. We need legal advice on our contractual position, whether we have grounds for a claim, and realistic options for recovery or settlement. This is a B2B matter worth approximately 50,000 to us in losses.