Bad Internet

From the time I started using metrofibre I had issues. Firstly the wifi had a reach problem I couldn't get a signal in my room so I bought a wifi extender. Even though it was quite an inconvenience and they should have warned me about it because other tenants in the complex have experienced the same thing, it's all good. Then I realized that this wifi buffers almost every single day. It has been getting worse since I noticed and buffers more than twice a day. Its really frustrating and I'm on a 25meg line with only 3 divecs max connected. I'm really not enjoying my experience with this isp and looking for alternatives.