wcing/mining/fishing all have high ban rates, could just be unlucky, ive been able to bot on my accounts successfully though, but i have friends who got all their accounts banned so i guess its just another ban wave they're doing
Almost all VPNs recycle IPs between their customers, it's possible that you used a VPN which was used by other botters who've gotten banned and were given one of their (flagged) IPs.
Best to use your home IP if it's not already flagged, or find the most private proxies you can. I suggest Virmach which I am a partner at.