It still isn't very clear, as you aren't quoting/replying correctly... So let's try and break it down:
1. You were trying to buy something on Dark Web market
2. You needed to pay with Bitcoin
Cash3. You bought Bitcoins on LocalBitcoins and then
sent 0.0353258 BTC to 1DG7hAnQ6ML5RWZxnivr3JdDActBaV3azT4. Dark Web market has not credited your account
If that is correct, then the only people who can help you are the Dark Web market... Bitcoin and Bitcoin
Cash are two completely different currencies... think of it like United States Dollars and Chinese Yuan. Marketplace wants Chinese Yuan (Bitcoin Cash)... and you sent them United States Dollars (Bitcoin)!
However, the very confusing thing... is that you said the "link provided" was for address "1DG7hAnQ6ML5RWZxnivr3JdDActBaV3azT"... that is usually a
Bitcoin address... Bitcoin
Cash addresses generally use a different format (most addresses start with a "q" like this: qqf0fah6qzmsymef2pcvg9l6xqhqnppcpsfkmdz495) to prevent this kind of mix up!
So... the two most likely scenarios are:
1. The dark web market is actually a scam, and you sent your bitcoins... and you're not going to get anything.
2. For some reason the dark web market is using a very "old" Bitcoin
Cash address format... and you sent Bitcoins to a Bitcoin
Cash wallet.
In both scenarios, the only party who can resolve this issue is the dark web market. Contact them and hope for the best.