T-Mobile breaking promises to seniors who were offered price-lock guarantee for life on 55+ rate plans

We have been with T-Mobile for many years, never missed a payment,  and felt that we had finally found a company worth doing our business with.  Most of the store reps have delivered excellent customer service over the years.  But now it appears that the top leadership of the company has just flushed all those "trusted" years down the corporate toilet.  We, as thousands of other seniors signed a contract that stated that the Senior Unlimited 55+ Plan had a "Guaranteed Never to Go Up" price lock.  Now we are being told that each line will go up $5.  And this is the second time that T-Mobile has purposely taken the liberty to raise our agreed contractual price lock (credit card to debit card change penalty).  We, as most seniors, are on a very tight budget; obviously not reaping the rewards of T-Mobile's yearly profits, which is evident in its top executive salaries (easy to google).  We will not only be forwarding this letter to Mike Sievert (CEO)(mike.siever@t-mobile.com) and the other top executives; but will be encouraging all our friends, neighbors, and any others to do the same.  And if this increase is not reversed, and T-Mobile no longer honors its contractual obligations - we will be looking elsewhere to do our business.  And we will be encouraging others to do the same.  Our trust level with T-Mobile has greatly diminished with this rate increase.