@Alexandra1640
You are certainly not the only host to do this. I hear that many established hosts are deleting or deactivating listings and posting them as new in desperation. But, you would have to do that over and over because the 'boost' you get is only temporary and I'm kind of appalled that a CS rep would tell you to do this.
Also, I would always be wary of advice given by Airbnb customer support, unless you are given the same advice over and over by different reps, because a lot of the time, they aren't that well trained or versed. I have lost count of the amount of times one CS rep has contradicted another when asked the same question and, often, CS seem to be the last to know about policy changes.
You wrote: "Airbnb could not figure out this bug nor why I wasn't receiving bookings." Firstly, I doubt the bug has anything to do with your bookings. This is a bug that has been happening for years and it seems to come and go. I have it right now with an unread message in my inbox. It often happens if you have a review to write, even though you have opened the message. But sometimes it's just random.
As to Airbnb not figuring out why you weren't receiving bookings, I'm sorry but that's total BS. Even the most clueless CS rep must know by now that bookings fell off a cliff for numerous hosts after the Summer Release. They are lying to you.
It's no coincidence your bookings were healthy for the first half of the year and then went to zero. It happened to me too, directly after the Summer Release, which was rolled out in early May. There are threads here on the CC with hundreds of hosts reporting the same. Basically, if people cannot find you, they're not going to book. It doesn't matter if you price your listings at $50 or $10.
Anyway, I feel for you. I really do. If it wasn't for bookings made in advance of the Summer Release, including a super long one, and repeat guests and direct bookings, I would be totally up sh*t creek myself.
I would suggest you try other booking sites if you haven't done so already. A lot of hosts have reported that they are getting bookings elsewhere, just not on Airbnb, or that the percentage of their bookings from Airbnb as opposed to other sites had decreased dramatically this year.