Upgrade/downgrade . telkom is a mess

Horrible experience and I've been in contract with them for the pas 5 years and have not received such incompetency, I was due for an upgrade on my Handset line and i decided to take a Huawei Matepad, and was told I can only take the Matepad on my LTE contract which I also have with Telkom, tell me why this people who assisted never told me the Matepad upgrade will overwrite the current LTE contract ? the current LTE was 360 GB internet a month and the Matepad comes with 12.5 GB a month, why was I not told the Matepad will overwrite the 360 GB ? does it make sense to downgrade from 360 GB a month to 12.5 GB ? and they call that an upgrade ? and they refuse to put me through to the shift manager /supervisor to sort this mess , like Telkom how does a person downgrade from 180GB to 12.5 GB a month and you call that an upgrade? and now because of you stuff incompetency I need to apply for another contract ? guy is it possible to hire people who care about their job? this could have been resolved if someone was paying attention on their work and gave me or asked me question because it doesn't make sense why would I want to downgrade from 180GB a month to 12.5 GB , I hate Telkom and the mess they cause me the past 4 weeks shame , i regret why i did the stupid upgrade .downgrade to begin with