Overcharged account

Once again, I need to use this platform to lay a complaint as you do not take your customers serious. Following my previous complaint....I took out (and signed for) a smart top up Xl contract in Feb. A month later I received an sms stating that I will be upgraded to a red package at NO EXTRA COST TO ME (as per the sms sent to me from you guys). Iv been on a red package for a few months and then there was some sort of a mess up and I was downgraded back to the smart top up Xl in August, hence my previous complaint. I was then contacted by a lady (can’t remeber her name) and promised that everything will be sorted as of the 1st of September 2017. I also made special mention to that fact that this migration was offered to me at no extra cost and asked if that remains and she agreed and said yes. I was paying R1388.50 since feb...why was I now debited R1638.49 for September? I contacted Vodacom on the 21st of September 2017 and spoke to a lady named Bonelo. She then advised that I was not charged the correct fee from the start as the invoices stated it was a Red contract (I signed for a smart top up Xl and was soon migrated to Red at no extra cost as per the sms). I then asked Bonelo to please get a manager to contact me. She logged the query but I never received the reference or the call from a manager. It’s rather frustrating that I need to continuously lay complaints and follow up on a mess up that you have made. I have been a loyal customer with Vodacom for 13 or 14 years and I seriously think it’s time to change. Your service and lack of communication is concerning. Please can you appoint people who are competent and are able to deal with customer queries in a professional and efficient manner. I demand my refund of R249.99 and that my debit order be changed back to the agreed amount of R1388.50 while still being on a red package. Please read this carefully as I do not want to repeat myself when you eventually decide to contact me.