Trying to buy BB LSB gives me error.

Please try what wowky25 suggested here. Thanks!

I managed to process the purchase on the web store and got crystals instead of the characters, and the bundle is still in my store. 

Please either open a case with an advisor by following the instructions here or use the in-game help to contact support. Thank you.

I tried, but did not get any popups that any other one is pending. I canceled the new one but still the Rogue One is still not in the shop.

Please try this suggestion below from wowky25 

Everyone I got it! 
The key is that after the "Oops,..." message from R2-D2 on webstore, you have to try to buy the BB bundle IN GAME which then gives you the option to "cancel pending purchase". After canceling, log-in to webstore again and it should work now. Hope this helps.

I can't as I do not have any LSBs in the store currently visible in any stores.

Give it some time and they should show up again.

I have opened a case. And spent 45 mins proving evidence. Got passed on hourly to some one that can help and told to make my own post of the forum. Feel like I have been brushed off. 
well if it has not been fixed my end of week, I will be demanding a refund. Cos this constitutes breach of contract. 

It didn't came back and it's almost time for the LSBs to go out of the store. It's very strange that NOBODY can help just cancel the erroneous transaction or give the option in the purchase history to "retry".

Hi. I bought two sets of speed of light (defective batch, rogue one-1). Instead of characters, I was awarded crystals. Please add the paid sets. My ally's code is 812-996-549