MTN taking me for a ****!

On 29 of January 2022 I took out a LTE home Router contract for R499. Today on the 1 March 2022, I have been debited R965 from my account on top of the R150 I paid for the activation of the contract. I could not even use the router until 31 January because I was not getting any connection and I had to call in for assistance.

Today I call in to ask why I was charged R965 for a month's worth of service I am being told that it is due to pro-rationed allocation of services for the days leading up to beginning of February. How when I only had connection for 1day which was 31 January???? How does that equate to R496?