Disgusting Service from Telkom

I am saddened by the experience that I as a customer am receiving from Telkom. I took a deal with them for black Friday last month, for a Samsung A8 for R250 per month. Everything went fine and the deal was taken out over the phone. This was the 23 November. On the 27th November, I received a message stating that everything has been approved and the order is being processed. On the 28th November i received another message stating that now they don't have stock. Then on the 4th December, they send another message stating that they will replace with the Samsung A6 plus, which is now a downgrade!!! I am extremely dissatisfied as they are debiting me for the A8, but they want to downgrade me to the A6. WHAT KIND OF SERVICE IS THIS TELKOM? On the 5th December they called me and I said that i will not accept this because we agreed to the A8. Many agents called me and promised to get back to me, but I did not get that! Eventually I received a message stating that my case has been resolved. When i called Telkom, they said that the system shows that the customer agreed to a refund. I want the Samsung A8 as agreed or something better than that. I will not agree to a downgrade! Please take note that i am being debited but I STILL DO NOT HAVE ANY PHONE!!! If this matter is not resolved then I am sorry, but I will be taking this further!