In January 2013, the plaintiff (Pepper Grinder Trading) entered into an agreement with the 1st defendant (Transmzansi, a subsidiary of the 2nd defendant Twalumba Civils) to hire out excavators, Komatsu Graders and Tipper trucks at agreed rates. The plaintiff supplied machinery from January to May 2013 for road construction sites at Victoria Falls and Binga. Payment was due within seven days of each invoice being issued. The 1st defendant failed to make payments totaling $130,290.00 as reflected in invoices marked annexures A-H. Each invoice was verified and signed by the 1st defendant's project manager, M. Muchetu. The 2nd defendant, through its bookkeeper G. Mukobvu, acknowledged the arrears in writing on 20 May 2013 and proposed a payment plan. Email correspondence between the parties confirmed acknowledgment of the debt. The plaintiff issued summons against both defendants jointly and severally. The defendants contested the claim, disputing that the invoices reflected correct work and amounts, and arguing that the 2nd defendant's letter did not constitute a proper legal undertaking to bind itself as co-principal debtor.