Worst service ever from Mondo

What a huge disappointment !!!!! I received a call from Mondo selling a Telkom contract for R99. Data usage was explained n I was advised of I GB bundle i’ll Received. Received my device on the 19/02/2018 which I could not use coz the sim was not registered. On the 20/02/2018 I phoned the call centre n my SIM was actived . That’s when I had a look at the device and realized that it was a older make . Come we in 2018!!!!!! I den contacted the call centre on the 21/02/2108 to cancel the contract n I was advised to go to a telkom store . Went to a telkom store n I explained my bundle I was supposed to receive n I was advised of a 500MB which was not explained to me. GOSH!!!! Spent over an hour in the Telkom store n was advised from the Mondo call centre that I could not cancel my contract in the store and that I HAVE TO COURIER!!!!! The device back to them. Which cost me R185.00!!!! This was not communicated to me the day I agreed to take this contact. The agent who assisted me at Mondo call centre was not very friendly not helpful she could not provide me with a reference number. I only had the Device for three days and when I want to cancel it I was told that they able to make a note on the system and they will only cancel it once they received the device , WHAT BULL !!!!!!! I then had to rush to the nearest post net like a mad person and was told that the package will only reached there after 4 days due to the weekend. This means I will be billed for a device i actually cancelled within 7 days!!!! Why should I pay more for a device I did not benefit for. So far I’ve spend over R285.00 for a device which only had 500MB don’t even want to mention the petrol money I spent with driving up n down. This service is totally unacceptable!!!!!!! It’s a true disgrace how customers are treated as you only concerned about making a sales. SIES!!!!!!!!!