Nondisclosure of all the facts related to UNCAPPED WIFI

I recently signed a contract for uncapped LTE 4g router wifi and have noticed that towards the end of the month it buffers and hangs if not stops working. Finding this too coincidental I called Telkom's call centre this evening and asked the consultant what is going on, it seems like there is a throttle on my usage. The response was an affirmation that there is a throttle when I reach 150gigs! I am not very tech savvy, shouldn't this be a necessary condition that was verbally relayed when I signed the contract? How can my uncapped wifi have capped conditions!! as a consumer there was no full disclosure of the terms and conditions and therefore limited me from making a fully informed decision. here I am thinking I can use the device at my will. No, I cannot! Isn't this against the CPA or worse an infringement on transparency? Besides I am highly perturbed at the fact that a 3rd party like control my device!