Dissatisfied customer

I recently had a very disappointing experience. My package was upgraded and charged additionally, and when I enquired I was told it was done through the self service portal but no proof can be provided. Aside being so overcharged monthly for Dstv services, this just adds to the disappointment as a customer, and I am a customer for 15-20 years. Just disappointing they always have loops and lack accountability. Utterly disappointed !