I phone 6s and 5s battery repairs

I have been using an I phone for the last few years now and have never once had any hassles whatsoever. Just 2 weeks ago my I phone 6s started to freeze and turn off for no reason. I took it to the I store (centurion branch) to run a diagnostic only to find that the battery is done (this phone is only 2 years old, I have had my 5s for longer than that and have never had a problem). I have handed the phone in for a battery replacement of which i am being charged for. I am now currently using my 5s. I did a software upgrade a couple of nights ago on the phone, as of today this phone has now officially died. I have tried for the last hour to charge it and turn it on and it is still non responsive. I am now out of options, and from what I was told I will only receive my I phone 6s next week. I am currently 29 weeks pregnant, I have a son 2 years of age and my husband works an hour away everyday. If anything happens to either one of them they cannot get a hold of me, or should anything happen to me in my current condition there is no one I can get a hold of. from what i understand apple are in deep trouble for supplying us with software that is deliberately slowing phones down and therefore putting strain on the battery life. I refuse to buy a new phone because I cannot afford it, and I refuse to take out a cellphone contract because those service providers are robbing us of money. My husband has tried calling the apple I store in centurion to get an update on the status of my phone and there has been no answer. I would like to have my phone back tomorrow! I am dissapointed in Apple and the way in which they have inconvenienced me and my family and the fact that they have now made it difficult for me to even promote their products. I will think twice from now on before purchasing any other apple products.