No connection due to wrong billing date

I have been calling all day with no assistance. I paid my bill for this month but apparently I must make another payment because my billing date was not updated. I called Rain last month and was told my billing date would be updated to the 25th like I asked. But it is still set to the 1st and now my router is not connecting. I couldn't work all day. It's absolutely ridiculous. I can't make payment when I don't owe anything and it certainly isn't my fault Rain failed to update my account.