NOS pushed off my appointment for technical visit

On Nov. 29, I went to NOS shop to schedule an appointment for relocating my fixed internet to a new address. It was scheduled on Dec 5.  I received multiple sms confirming the visit.  I even received a call from NOS on Dec. 4 confirming the visit. 

I waited at the house for the whole afternoon and nobody came.  I went to the NOS  “client area” just to find out that NOS has pushed off my appointment to 2 weeks later (Dec 21).  

Now I am sitting at the new home without Internet access. 

Can anybody help me please?  Thank you!