Shocking service

I purchased a liebherr integrated unit from Hirsh's Silverlakes in September 2015 , with a 3 year warranty. An additional extended warranty was purchased extending the warranty period to 5 years since date of purchase which effectively is 2020. I reported the unit to be malfunctioning on the 02.03.2018 and was advised it would be 48 to 72 h to resolve. Have been following up every week until a technician from Liebher came out two weeks ago and advised that a new runner was necessary however the unit was still under warranty so it would be ordered and installed. A young lady by the name of Lisa advised me yesterday that the said part is not under extended warranty ( fridge is still under normal warranty) and I should make my own arrangements to get unit repaired!!! A whole month of incompetence to tell me such nonsense??? Manager at Silverlakes assured mw this would be solved but nothing has happened yet. Do not buy from Hirsh's!!! Shocking after sales service