Bul**** into taking a loan (miscommunication)

I got contacted last week by one of the Bruma Finance customer care personnel who then offered me an upgrade on a loan I currently have with them. When I asked for information regarding the \Upgrade\" I was told I should send through 3 months latest payslips. Shortly after that i received a sms saying that I have been pre-approved. I went online and accepted the quote because as they told me this is an upgrade on the current loan. I called them on Monday to find out how far the upgrade was and the consultant told me i had been approved for R5k over 6 months and that this was not an upgrade but a ANOTHER loan. This would mean two installment's to pay, which i cannot afford. I asked to speak to the supervisor to escalate this matter. I eventually got hold of the supervisor who tried helping but also came back and told me they can't do anything to help me. I asked if they had listened to the recorded calls and he responded yes, but persisted in me accepting this loan, instead of dealing with the matter. There's a lot of miscommunication going on here which has become an inconvenience and no one from Bruma seems to understand this. I'm highly livid and need this to be sorted ASAP!! "