Constant lag spikes since I came back

I just resubbed for 6 months but every time I go to Zuldazar in Zandalar on Shadow Council I get 10 second lag spikes every 10 seconds or so. Makes the game un playable and chat is filled with people experiencing the same. I came back to catch up before the expansion not to play old content for the 100th time. Any word on sub compensation or fix for this? This is 4 resubs for my family that are being effected and many others on the server based on chat.