Horrible service

I’m so disappointed in the service from Jenny. I work for a US company from 16:30-1:00am everyday. Every single night from around 18:30-19:30 my internet speed drops so low that I cannot make any phone calls. Every single night I’m on the phone to them, this has been an ongoing issue since 30 Jan. They are not coming to the party and assisting me with the issue. I’m going to lose my job because of this.