Nicehash problems... Have me beat

So my problem is

1.Got a vega 56
2.Downloaded cast-xmr miner
3.Set up everything and the miner recieves "connection time out" errors
4.I tether my 4g cellphone and bam it works!
5.I notice I am getting an ipv6 ip and i disable ipv6.
6.I now get a ipv4 adress but it still doesnt work

Please would you help me out?

I really wanna mine with nicehash.

Have tried with different miners and none seem to be able to connect to either 3355 port or 33355 (all though when trying 33355 i do connect but get socket closed instantly)

Firewalls are disabled
have been in touch with ISP, no outgoing ports have ever been blocked
Firewalls are also disabled on router
Tried 2 different routers, no go
Windows 10
Nicehash legacy app does work flawlessly, connects etc no problems

I've been at this for days -.-


Thanks!