We are renting a house that was originally being managed by Guardian. Thankfully (this week), it has now been taken over by a new Property Services Company.
We recently moved in to a property that was in terrible condition. We reported various things, some of which were extremely dangerous to the lives of our young children (e.g. one of the main fire escape exits was locked shut and we didn't have a key, vertical blinds stuck in semi-open position posing a threat of strangulation, drainage pipes broken and large holes/water pooling on the property...etc.), I chased them about this regularly, but 8 wks later and still nothing has been done. We have had to go to the time and expense of getting some of the repairs done ourselves and when we finally got through to a "manager" (in the loosest of terms), I was confronted with an argumentative representative who was not only defensive in their communication, but also downright rude. [redacted due to personal identifier] is absolutely vile - she cares more about trying to be 'right' than she does about doing her job.
Thank goodness the owner must also have been having issues with Guardian as they have now pulled the property and placed it with a professional property services company.

Guardian Property Services - avoid them like the plague.