Vodacom no service delivery

I sent following e-mail to Vodacom on 11/9/18 to date no reply, Good day, I have a complaint re point 10 of your terms and conditions pertaining to the uChoose contract. It states" 10. Monthly subscription airtime allocated as part of uChoose Flexi Plans will carry over up to a maximum of five month’s allocation, recharge airtime does not have an expiry." I have spoken to various people at your call centre and not one can explain point 10 to my satisfaction. I have been told that the carry over is to a maximum of 3 months, 5 months and 6 months. They have no idea of the value that can be carried over and how Vodacom deducts airtime when you have reached your limit, according to my interpretation of what they tell me there is no carry over allocation within the uChoose contract. Can a Senior Manager, that has knowledge of this contract, please call me to explain point 10. Thank you, Disgraceful service, I have been their customer for years and have 3 contracts at present