As Soon As
Just After, Immediately After, Promptly, Quickly
noun, suffix
Essentially you have the kanji 早 twice, because 々 is just a repeater kanji. When you have something early twice, it obviously has some kind of urgency to it. You'll need to take an action as soon as you finish whatever it is you're doing there.
そうそう
はやばや
The reading is just the on'yomi readings (which you learned with the kanji) twice in a row.
早々におへんじいただきありがとうございます。
Thank you for your prompt reply.
年まつだからか、人々が早々とすぎさっていく。
I wonder if this is because it's the end of year, but people are passing by quickly.
新年早々、借金を催促されるなんてひどすぎる。
It’s too cruel to demand money right after the start of the new year.