Income Verification delay costimg me money I don't have

More a cry for help than a complaint at this stage. I've been trying to get my income verification reviewed for change of installment to the appropriate bracket. I have been assisted by Misa on 17 April and Noqobile today (24 April) via WhatsApp. Both told me that my e-mails containing the relevant documents "are being referred to the relevant department and I will receive feedback within 2 - 3 business days". I can't wait 2-3 business days for the next few months because I can't afford the installment based on income I don't receive. From a legal standpoint I don't understand how Discovery claims that lying about your income will lead to ******** charges, but they are allowed to take way more money from us even though they sit with all the proof of income (or lack thereof). It doesn't make sense to me at all, and it is really concerning...