Bad customer service

I've reached out to Telkom multiple times regarding an unexpected increase in my billing for both September and October due to unknown 'subscriptions.' Despite my requests for a manager or senior representative to contact me, it's been nearly 3 weeks, and I'm still awaiting a callback.

Today, when I called again, I was given the same assurance that a manager would call me. I'm genuinely frustrated and annoyed as I have no knowledge of these subscriptions or their benefits. I would appreciate a reimbur*****t or resolution for this matter.