How can I get my dynamic IP to change?

After 7 years of having the same IP address I’ve decided I want to change it due to it being banned in 30 or more places on the internet.
So I’ve tried to:

  • Reboot my router many times. Same IP as before is there.
  • Leave the router off for a 1-2 hours. Same IP as before is there.
  • Change the MAC address. A new IP shows up in DD-WRT but I cannot load any webpage. Going back to the old MAC restores the old IP + internet connectivity.

I called up Trakia Cable to ask them if they have a dynamic, and apparently, I should have a dynamic. I also asked them if they do MAC locks, and they said no.

  • Router: TL-WR841N V12 using DD-WRT latest build for the device.
  • ISP: Trakia Cable
  • I own the router.

My neighbour who uses Trakia Cable as ISP has also had the same IP for the last 6 years, but I am not sure which brand that is.

So how to just get a new IP that is clean with no bans and blacklists?