79771 shows have one month Pro membership from today. can you try to do a refresh on your netCut pro tab page ? just click on the “refresh” button inside netCut pro tab.
If you believe someone has your WIFI password and is in your network, you can change the WIFI password. it will stop him getting back (condition). some old wifi router (I don’t think yours is the case. just login into your router and make sure your connection security protocal is NOT WPS or WPA1 .