9 days without service reimburse me

from the 19th July until 28th I had no internet connection apparently because of construction work in my area.so for full 9 days without service and on tuesday I phoned finance department for re-imbur*****t for the days i didnt have service, the lady advised I sent an email to *** which I did but till today there is no response or acknowledgement, today they sent an invoice of full amount, thou I have already paid the full amount on monday i was expecting for the reimbur*****t for the 9 days without service am very dissapointed in the poor service you offer to your customer kindly take your customers serious, from here am going to lodge a complaint with ICASA if I do not get a response by COB tomorrow.