Poor service

On Sunday (9th July), I app**** for fibre installation. Paid the initial premium. Then I was going to be contacted by the technicians for an appointment. Unfortunately because of my kind of job, I missed the call. Subsequently I received an sms indicating that I should indicate when can I be able to receive the call. I responded with a "now". But I never received the call until now, and another challenge is I was not able to identify a call from Hypa. Now the consultant told me that the company calls only once and you are expected to answer the call. If not, you won't receive another call. That's the most ridiculous thing I have ever heard. I guess, I should receive my refund and look for another company with a better service.