Still no response from retention department for urgent upgrade

I am really fed-up with Mtn I have asked for an early upgrade on 2 off my numbers as I am flying out the country next week and require the upgrades urgently I have been with Mtn for 7 years and it is really frustrating that vodacom could assist me with an early upgrade but Mtn just does not care. I will be out the country for the next 8 months and my original upgrade date is on the 1st of December 2017 I need an upgrade buy this weekend or I will have to cancel my contacts with Mtn I have 4 lines with them.. I posted this issue on the 17th of October 2017 received a response saying that it has been escalated to the retention supervisor team who will make contact with me but no1 has called as they don't care for their customers... I will advise that no1 takes out a contract with Mtn