Expected to pay for LTE & Fibre

under the advise of a consultant I have cancelled an LTE to move to fibre because I wanted uncapped access. The LTE service ends in 31st Aug & fibre will be pro rated for the same month of Aug. I have asked that they either do the activation on the 1s Sept or give me a credit for the LTE. It's the very same Institution & and they know I am still on LTE & there was no activation date. The contact person told me to call accounts to change the invoice date because I am not paying for the service I am not making use of yet. When I app**** on client zone, the pay now had 0.00 and they created an invoice with no date. Seeing that I always make payment on the 25th for the up coming month. I assume the invoice will be for then. Now the person at accounts wasnt interested in listening to reason & merely told me their terms & conditions stipulate you pay after installation. If I had been told upfront by the consultant that advised I had to cancel the LTE to apply for fibre. I would have only app**** in Sept. I was told even if the Dr order reverse which it is going to. I would still be liable to pay for the service I have not used. I have been with Afrihost for some time & never have I been treated this badly. The economy has affected us all the same way & I would hate to think that's how they earn extra income from clients. Then my attempts to run from Telkom tendencies have failed