Metrofibre unstable slow internet

After over a year my internet is still unstable, on and off, often very low speeds. Often unusable. This is not normal for a 25mb fibre line. Ive complained to afrihost many many times but the problem is with metrofibre and probably physical. We have complained to them many times as well. Metro finally came out after more that a year! Spent 2 min here and now the internet os worse!!!! What am I paying for? Will this ever be fixed!?