VOX Telecom are a bunch of ******

OMG I utterly regret not going through VOX Telecom's reviews before I signed up. These people are total ******!! I signed up for 1 of their unlimited LTE packages and my simcard was delivered on the 24th of December. Before I signed up I specifically asked the consultant how would billing work since it's the middle of the month and he assured me that I'd pay a prorated amount for the 7 days left thereafter I'd be billed the full amount of R860. Come month end my invoice states I must pay R1900, meaning I'd been charged the full amount of R860 for the period between the 24th- 31st Dec 2021. They are adamant that I pay the full amount as per the invoice and are willing to lose me as a client. It's the first I've ever encountered such nonsense. VOX Telecom is B*S, their consultants only want to make sales and will agree to everything you ask then you're left to deal with all the ****py service