Please help romford patio

[Sparkz]

So after a rotting slippering decking a landscaper tiler was highly recommended - hired for indian sandstone paved patio area some stepping stones a circular patio and a few steps up the other end of the garden. He charged a lot. It was a huge purchase - im very u happy with the tiles two weeks on every tiny mark is showing up even a spot of water looks like a stain. Needless to say hes not answering my calls or replying to messaging but looking at the forum looks like he didnt bother sealing the tiles - lots of white residue even fox footprints are showing up - tried hosing down and gently sweeping with broom but stains are still there needless to say im devastated even this morning the edges of the tiles are wet! Im assuming its frost? but its been two weeks how can i help restore or protect it from getting worse pls help

 

[Onajite]

You will likely need to apply a sealant or an impregnator. Check here for a comparison of both: Which Pavement Sealer Do You Need for Your Paving? | Patio Advice - https://www.minsterpaving.co.uk/news/pavement-sealer-need-paving/
You might need to reach out to another tiler too.

 

[ltppebbs]

Has the patio been sealed? or was it just washed over ?.
Looks like jointing compound used but something else around
Aco drains?.