I have sent numerous messages and recieved no replies!
I have even asked just for a message saying not interested so I can see if the site is real. Still no replies! Is there something I'm doing wrong? Tech wise i mean.

You need to mention what dating service you are using and if it is on the website or app.

Did you pay for the service? Some services are free and allow sending and receiving of messages but others do not.

Need to answer these questions before we can answer yours.

sounds like you are messaging dead profiles if you get no replies