I think the one of the hardest things to do is be patient during cycling, even with fish. You go to the store and see all the products and think, surely they wouldn't sell this if it didn't help and all you can think about is getting that ammonia level down. So I understand why these products are tempting.
Your best friend right now are water changes cycling can take a long time.
Did you ask Walmart about taking back some of the fish?
I know you were going to look into a larger aquarium also.
About your PH, it is on the high side, assuming the strips are correct. I wouldn't mess with it, most fish can adapt to your PH and are better with a steady reading rather fluctuation.
You might want to test the PH in your tap water too.
When I first started I had the strips and it showed a high PH, but when I got the liquid kit, it was actually a lot lower.
I had just gotten an e-mail from Petsmart, they're offering free shipping for orders $25.00 and over. I know they carry the API master kit, this might be an option for you since all you have is a Walmart nearby. If you decide to order from there, get some Prime, it's water conditioner and will help neutralize the ammonia, but not in detriment to the cycle.
So be patient, do water changes daily. If between water changes your fish look like they're in trouble, you can always do another. Always test your water before changing it and keep a log of it. The cycle will happen and when it's complete, you'll find your new hobby very relaxing and we'll all celebrate with you!
Edit: I really am sorry to hear you lost your guppies.