If you changed provider, I doubt your new provider uses the same stream numbers, otherwise you could have tried to use the info posted in this topic:
viewtopic.php?f=57&t=32299If you don't have a clue what you are doing with the info provided in that topic, don't do it and go for the standard way and add your new channels again, otherwise you could f*ck up your DVBLink install.
An other option you have is that you add a new iptv source with the channels from your new iptv provider, add the new channels and use channel merge, where you use your mouse to drag the new channels in the channels tree, with your already designated channels from your old iptv provider.
All the work with channel renaming and numbering is kept in place and when you are done with merging all the new channels, you can remove your iptv source of your void provider. when done, you will see that all the channel names and numbering from your new provider remains the same, like it was with your void iptv provider.
Just test it first with a couple of channels, so you know what to do.
DVBLink server 6.0.0 build14499, DVBLink TVSource 6.0.0 build14061, DVBLink for IPTV build 13107
Kodi 18.0-ALPHA1 Git:20180125-7379a75, Win10 Pro x64 1709 build16299.125