Yelled at Mom today fed up because of her not having Dad buy lemon pop for me

I had to literally yelled at Mom today a few moments ago because I'm completely  fed up  with  her constantly delaying Dad  on getting me a pop flavour.  I have the other 3 pops and it takes me a month. to get through them.

I always like to stick four cans of all the flavours flavour at once unless I  really, really, really have too stock less then four.   It looks disjointed if I have four of everything else, and only 3 of  a flavour.  So I always like having backups 

What's is annoying to me is Mom's excuse for constantly delaying is either a) "you're not going to drink all of that in a month"  or b) "it will take you a month to get back to them again" .

About three weeks ago,  when I put the last three cans of this pop (Lemon) on the shelf Mom had promised me that she would have Dad buy it this week.  But as soon as I asked her about it toinight I knew the first thing she was going to say is the same  stuff she been saying since January about "I don't need them this week" or whatever.  So any wonder why I yelled at her so loudly that Dad could hear?  I mean I been waiting as patiently as January for back-ups and that was when i still had at least maybe 8 cans of Lemon pop!  

I mean because of Mom not keeping her promises-like this one and there are other ones I can't remember quite now but I might remember ones later - oh about in Nov when she and I went to the mall, to do Christmas shopping and she had promised  me the night before we could have a snack and I could buy a drink to go to that snack  and then go back on it the very next day?  Sure we did have supper at a restaurant that night but that wasn't the original plan. 

It's like she has never read Robert Munch's "A promise is a promise" book and I don't think I ever read it but I know the book is "A promise is a promise even if it's just to myself". 

But having to deal with a) "you're not going to drink all of that in a month"  or b) "it will take you a month to get back to them again"  since January,     any wonder why I lost my temper?     

This particular flavour of pop I can't just walk into my local grocery to get it.  Why?  Because the store doesn't carry it!   So that's why i need Dad to buy it for me.