POC System doesn't save guaranteed 25% electricity

We unluckily had the POC system installed, after responding to an adverti*****t on Radio Oranje and the website adverti*****t. We didn't notice any electricity saving, notified them, upon which they sent technicians to try and solve the possible installation problem several times. No problem there. We were then informed to email six accounts before installation and three after installation.When my husband followed up, he was told that they haven't received any emails, so he emailed again and again, to no avail. Eventually he was told that the lady working with the emails wasn't in their employ any more, she left with the laptop! I then phoned Pieter van de Venter and he asked me to email the municipal accounts to him again, and I then scanned an mailed thirteen accounts before installation and six after installation and calculated the percentage decrease in electricity usage, which was a mere 1,758%, not even close to 25%. Pieter van de Venter promised me that Mervin van der Merwe would phone me on the 26 March 2015. No call. We paid R12500 for this system that doesn't work. Anybody, please help! I cannot believe that nothing can be done to these people!