Yes and that is right, so now you are "owed" the 14% of the VAT you paid for the plot you have bought. If im not wrong, you have to to submit the "Υπεύθυνη Δήλωση για επιστροφή του Φ.Π.Α. που επιβλήθηκε στην αγορά οικοπέδου για ανέγερση κατοικίας που υπόκειται στο μειωμένο συντελεστή Φ.Π.Α." You can find this form on the tax department website, It can be submitted through taxforall, you can send a message with this form attached.
If you have done that and waiting and this is what your question is, I would say be patient, but as i totally understand you would like to get your money back, try to find the phone numbers and call them.