Neglected my needs as a customer

I've been on telkom contract for over 5 years. This year I decided to take two laptops and pay up/settle one of the devices, but the sales lady from telkom alberton messed up everything didn't give me the information I needed to Close/pay up the other laptop. I payed 4k upfront with intention to pay off the device. I then called in a week later was informed to all retention center, so all the departments, billing, sales, retention aren't able to correct the the mistake done by one of their own.....

I'm so annoyed at this I never thought I'd think twoce about recommending telkom. When I've been a happy client all this time. Today it's sad to say, they prioritized sales and avoided giving me information that I needed. When I clearly said I want to settle an account so I can afford to pay for the ones I'm taking.