When applying to do ...

When applying to do an upgrade on our modem they failed to close our old profile when they activated the new profile I paid an upfront fee to receive the modem now they are charging me for 2 wifi profiles that i was promised that the old profile would be nil and void from the beginning of the month..... As well to put the cherry on the top they went and increased the data and airtime amount without our consent and or doing and when we call them they adamant that the payment has to be done but ive paid the amount for the upfront usage and its on the second day of the month i would like to know why im paying for full months in advance for 2 wifi modems whe i have not even used the new modems