Dissapointing service

<p>My windscreen was replaced and the wiper arms were not properly tightened by the technicians-this caused the wiper blades to jam and got damaged eventually.</p> <p>After registering a claim now I'm been told that they bought the parts but they want their own technicians to install the blades, something that I'm refusing unequivocally because of the history and the fact that I will be loosing any related warranty...I haven't had any response since I lodged my objection to this suggestion ,this worries me a lot because my car is without the wipers making it inoperable for two weeks now.I have been inconvenienced by this immersinly and there seem not to be sense of urgency from PG Glass.</p> <p> </p> <p> </p>