no internet

Since beginning of february my internet is so slow that it takes me about 10 min to load a page. I have reported on 5 february, they removed errors from the line and it was working fine for an hour. I reported it again on 8 february ref 277ctk080215, but are still awaiting response/feedback. I pay my account every month and want to receive a service every day. Since I installed this adsl line I have battle to get the speed I'm paying for its really time that this problem is fixed permanently