Ist sms-activate.io sicher?

Trust me not to use this scammer base application. The support treat you like shit. I have an issue on Shopee verification over using Voice activation. They system capture 8 digit code when the application requires 6 digit code. I immediately contact support that the verification did not match require length. I tried resend thinking it was a bug or something it still send 8 more digit on top of the previous one. When i am still having 12mins on the rent. They asking me for screenshot and the error. And then the rent time was almost up. They just ask me to use the last 6 digit which did not work at all and then this support guy was offline and gone. I get to ask for update a 2nd support came but did not fulfill what still why ask me why i did not activate the code when THE CODE IS WRONG AT ALL.. Which part they stupid and did not know it!. then it came for the 3rd support guy. Now this guy got the guts to ask me for a video proof.... what the hell is the first support doing then? Come one man..... you guys are such a cheater company. They still dare to say without video we cant help at all...... WHY AT FIRST YOU DON'T TELL CUSTOMER FOR A VIDEO FIRST????