DO NOT TAKE EXTRA MONEY FROM MY FEES THAT I HAVE PAID IN ADVANCE FOR 2018

I have paid my January 2018 fees in advance, in Jan 2018 I have paid for fees up to June 2018, sooo if you are also changing prices due to VAT, know that you cannot take my money/extra money off my instalments that I have paid as they were set in Jan 2018, I have paid in advance in Jan for fees until June 2018, and this was way before the vat announcement, therefore I should not be affected by this until my june payment elapses, it is against the law to take my money that was paid for a set amount......so please do not test me, you can call or email me. I don't need any troubles dear VA