0.8 kg and need to flea treat

[Sometimeswinning]

Just got our little boy 7/8 weeks today. Random circumstance. He has fleas and I’m not sure how to treat. Any advice please.

https://www.amazon.co.uk/Shampoo-Bugalugs-Cleansing-contains-Balanced/dp/B0CH871W8W/ref=asc_df_B0CH871W8W?mcid=330bd975371e3c048d1de3aa17972027&hvocijid=15403671209072709953-B0CH871W8W-&hvexpln=74&tag=googshopuk-21&linkCode=df0&hvadid=696285193871&hvpos=&hvnetw=g&hvrand=15403671209072709953&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1007129&hvtargid=pla-2281435177898&psc=1&gad_source=1

This stuff is great I can't see there's a weight or age mentioned, the fleas literally run off into the bath!

I’ve ordered it! It says 8 weeks so I’m doing it. Thankyou.

For fucks sake don't use this. Neem oil can be toxic for cats if they ingest it.
Go the vets and get a proper pharmaceutical product suitable for a kitten of this age and weight.

This! Get to the vet!

Obviously. None are open over the weekend round here. It’s not the end of the world I just thought I’d check if there was something I could do. To be fair he’ll probably be the correct weight in a few days anyway.