Telkom mobile wifi nightmare

I took out a mobile Wi-Fi contract with Telkom online in June 2018. That's when my nightmare began. When the device was delivered, I was given two modems instead of 1. I called Telkom to rectify the matter and I was advised that they will send the courier company to rectify the order, that was in July 2018. The courier company never came to fetch the devices.To my surprise Telkom debited my account for both devices. I have spent most of my precious time running up and down visiting Telkom shops only to be told they cant help me since it was an online order. I have made numerous calls to the call centre only to be bombarded with reference numbers and case numbers but no one has sorted this out. As if it cant get any worse , none of the devices are working now, meaning I am paying Telkom for nothing. Telkom please fetch the extra device that I did not order and unbar my network service for the device I ordered. Additionally, refund my money.