@dimpap5555 you were given help by multiple people. The link the @Gunner gave you explains it all. What more do you need?
Additionally as @vhymanskyy had said, search THIS forum for the "Failed to Disable Echo" topic. This should yield quite a few results.
The problem is not with BLYNK, but with something YOU are doing wrong. Put forth some effort in trying to figure out what is the problem, instead of just stating you have an issue, posting a screen shot and then bashing BLYNK and its Founders. Maybe include some pics or diagrams of your set-up and wiring, along with details about your hardware.
If you think you can do better, go ahead and give it a try. Post a link to your IOT Platform/Service so we can then see how it is done.