Fiber Link has NOT been working for 2 weeks

I honestly don't know what else I need to do to get assistance from Vuma. You installed a Fiber link at my place and I cancelled my LTE when the fiber was activated. The fiber internet now doesn't work and I cant do work at home because I don't have internet. I cant go to the office either because there is a pandemic. I am essentially going to loose my job because of this. Can you please attend to my issue. I have tried all avenues with you and still have not received any communication.