Telkom either hires *********** people or they generally competent at giving poor service

I had signed up for a 24 months wifi router @R150 with telkom since January 2018, for the past 12 months everything was fine. My bill was curbed at R150 . My problems started in July this year where I was billed double my monthly installment. On the 15 of August Telkom billed me R271.99 and on the 25th of August they billed me another R544. I called Telkom and I was told they dont have records for the billing of R271.99 of the 15 of August, So I reversed the payment since it does not reflect on their system. September month I was billed R79. And the end of October I was billed R420 and now they sent me an invoice of R569 for the end of November. My contract is for R99 with a provision of R50 should my data lapse. All in all if my data is depleted I should incur an extra charge of R50 for extra data. I went to telkom branch with my query n what a waste of my time and energy, they told me to phone in. Im very dissapointed as this is my third contract with Telkom experiencing the same thing. Im gatvol of telkom, my ma hoer my.