Is there a refund for days without internet?

Hi,

So I installed KPN fiber last week and it worked perfectly until one random day when it stopped working, the internet light is just blinking. I called support and they created a request to send me a temporary device with 500GB data allowance. I’m yet to receive it and it takes 2 days for it to be delivered. 

Customer support was also unable to rectify the issue from their end so they said a technician has to visit. Earliest technician available is 13 August (a week from now!), which is pretty inconvenient. There is no guarantee the technician will fix the issue on the same day, its just the date they will investigate. 

Does KPN offer any refunds for the amount of days that I am unable to use their service? It is a pretty bad experience since I just obtained their connection last week, and within just 1 week, it is not working. I am left with no internet, having to use my limited mobile data, and then decrease my normal usage to stay within the 500GB allowance (can I renew that by myself?).