The photos of the signage look pretty clear:
It's a short bay and the suspension sign was attached to the regulatory timeplate for the bay you parked in, which is
here.
Not looking at the signs can be fatal, there is a duty to check the signs on every occasion and being a frequent user of the bay is immaterial, so we'd have to look for a technical challenge.
I will request the traffic management order, but in the meantime please tell us if there's any meaningful mitigation, whether you are a blue badge holder, how long you were parked for and for what purpose.