Really sorry to hear this happened to you, its devastating 
This also happened to me. I had nearly 20 follicles and upon egg collection, no eggs. The consultant tried to tell me i might have something called "empty follicle syndrome" which if course was devastating to hear. I decided to research this, went to see the top endocrinologist in the country and it turns out that "empty follicle syndrome" isn't technically correct, but rather what can happen is that the eggs can be immature, too mature or reabsorbed into the body. But i digress. My 2nd ivf attempt worked, resulting in my DC so all is not lost!
My advice would be to take this matter up with the manager of the clinic. ask for you file (or at least copies of your follicle growth charts) and don't let it rest til you are satisfied with their answers. If you want, you can even go as far as reporting to the HFEA and try and get a refund as the clinic might have screwed up your cycle (its suspicious as the doctor seems to be covering his backside by saying you were advised to abandon cycle - which you say you weren't). Firstly, i wonder why they let your larger follicles grow to 26.5 and 24? This is way, way over the standard trigger size of 17. As I understand it, once the follicles grow past a certain size, the eggs inside can become too over-mature to be of much use. It is pretty much standard in clinics to trigger at 17 as the common belief is that this is the goldilocks zone for fertilisation and egg quality. IVF/ICSI work best when the follicles are around this size at trigger. If the clinic are delaying triggering because they are hoping for the other follicles to catch up, they are running the risk of losing the larger follicles as once they grow past 17 its likely the eggs they contain are over-mature. I have had treatment at 4 London clinics (trying for a sibling) and trigger at 17 has been the rule at each clinic.
It seems like there was a big difference in follicle size in your case, so the clinic were really taking a risk not triggering when your bigger follicles were around the 17 mark. Even though you may have only got 2 eggs, 2 is better than none. Another explanation might be a dodgy batch of Ovitrelle, resulting in early ovulation. This was a likely explanation given to me by another Consultant when i explained my failed egg collection cycle, he said at his clinic they would have investigated the failure, as opposed to laying blame.
When i had my failed egg collection, it was my first cycle and I knew nothing about ivf. i trusted the team to do their jobs. I didn't have the confidence to complain or demand an explanation. Now i'm 6 cycles along and 4 clinics later, I feel like a bit of an old hand at this and if it happened to me now i would definitely kick off and demand answers. IVF is one of the only things in life that you throw money at blindly with no guarantee of a result. There are many people amassing fortunes off the back of infertility and the clinics should be answerable for poor practice and mistakes (if there have been any).
On the other hand, you might not need the stress of the complaints process and could decide to just move on to your next cycle without the stress of a failed cycle at the forefront of your mind. Put it behind you and all that. Its up to you 
Sorry for the mammoth post. I hope it helps and I'm happy to answer any questions x