Bad customer service

I called Vodacom customer service because I bought a data 250 mb and I only use whatsapp then 5 minutes after buying data I got a massage saying I have 115 mb then 3minutes later I had 45mb left so I decided to call their customer service and I was assisted by a consultant called Simbulele and she was so rude. I explained what happens to my data she told me with out even checking that is the device that I use which is iPhone that finished my data and I explained to their that I have been using this phone for long and the I have been buying the data daily, she then asked for my ID after that she didn’t not even say u must hold on which she’s checking the next thing I was speaking to Linah who is the TL who said thAt Sibulele was assuming that my data bundles were depleted because of my device since their system is down