Shocking Customer service

I have a 200MB fibre line. Been extremely happy with it. Last 10 days I only get about 5MB in the evenings ( peak times) it is basically useless to me.

The customer service has been shocking to say the least. I have had this up and down with their consultants for the last 10 days and still they cannot even log a fault with their provider after this time period. SHOCKING????

How much longer will they take with a already frustrated client before i seek better service???