Manhole in front garden overflowing muddy water
In the front of the garage in the front garden there is a manhole 40x40 cm that is overflowing with muddy water. It is sitting in concrete slabs not on earth but next to the turf, and it has concrete walls. I poked inside with a rake handle and at about 1.5 m I hit mud. The muddy water had many large rags all of the same thin material floating or settled at the bottom, and they certainly didn’t come from the drains inside the house. There is hardly any smell except when it rains, and there is no evidence of material coming from the kitchen or toilets.
The landlord doesn’t answer phone or email, and before calling people who deal with blocked drains I thought I’d ask here in case this could be something structural rather than blocked drains. Can anyone give an explanation or suggest who to contact?