Unable to sort out billing query

I have been trying to sort out a billing query with Uber for ZAR 61 for more than 3 weeks now. It is unbelievable that an international company of this size cannot sort out a simple issue like this. Attempts to find out why it is taking so long have been fruitless, I have asked for their help desk to connect me with the team they say are working on this issue, but it seems that they are unable to or refuse to do even that. Luckily there are now competitors in the market so I will be closing down my account as well as my company’s corporate account. I guess they won’t care but what can you do?