ᐅ Should the awning installer fix this? – Is this considered a defect?

Hello dear forum community,

I purchased and had a canopy installed by a nationwide company from Duisburg for 3200 euros.

Due to the external thermal insulation composite system (ETICS), injection anchors were used to attach the brackets (to which the canopy is fixed). However, one of these anchors was installed at an angle and looks unattractive in the visible area (see picture). Additionally, the plaster seems slightly pressed in, so I’m unsure if anything needs to be done there.

I reported this to the company and expected someone to come and inspect the issue and adjust the angle. That was not the case; instead, I received a brief reply stating that this can happen with these types of anchors and does not affect the function of the canopy. It was disappointing, so I exchanged messages again and requested an on-site inspection and possible correction.

No one came, and the company replied once more that it is not a defect and that I had signed the acceptance protocol (which I unfortunately overlooked at the time).

What do you think? The invoice has not been paid yet. Should I withhold some payment and have someone else fix it (I could pay the withheld amount later)? Or is it not really a defect and the canopy installer is correct?

Thanks in advance for your assessments.

Best regards,
Robert