No service delivery / Customer Care

I am currently more than disappointed with the service that I am paying for , I have called and got a ref number and have spoken to an agent after that about the service, all I get is promises without service delivery, Its been more than 3 months now, singing the same tune about this problem of the fibre. we are spending more on buying external data to function, whilst we are supposed to have a functioning fibre line, but it works 4 out of 10 in a day in a stable manner, but invoices are coming for payment. its unfair to be paying for something that's not fully functioning. I don't know what to say or do anymore about this issue, honestly. If there were a way to cancel it, I would. At the present moment, I cannot even recommend the institution to anyone looking for uncapped fibre. I am so tired of begging for a service that I am paying for.