Appauling, Unbelievably bad

I moved to Saudi Arabia at the beginning of January and bought in advance 14 months internet connection for my home. To date my STC internet has not worked. I have been back to the shop on numerous occassions and they say they have fixed it and when I go home it doesn't work, sometimes if I am lucky, it might work for 20 minutes (very slowly) then cuts out completely. They guaranteed me a service but to date have failed in doing so. Tuesday evening I bought 300 SAR of STC Credit for my phone (the money I spend on my phone bill is huge, due to having to use that for my internet supply) and only yesterday, Wednesday, keyed in the code numbers to upload the credit to my phone.....it said it was successfully uploaded. Went to call somebody last night and I am told I need to top up as I have no credit on my phone..........
I have spent to dated over a 1,000 euros for a service that does not work!!!! This is appalling and nobody in STC seems to want to listen to me nor even help. I asked for a refund for the service they were not providing and I was told 'No'. I am sure you will all agree that when you live so far away from home, the internet is so important in being able to communicate with your family. I barely get to talk to my parents anymore as its so expensive to use the landline!!!!!!!
STC, Please do the honourable thing....if you can't provide me with a service then refund my money please

Helen McGrath