Over promised, under delivered, consumed by greed

Many years ago I started investing in renting solar panels when promised a steady income from the rentals. Now Solar Exchange sold their business to Jaltech. Now Sun Exchange deducts the income that I've received so far (approximately 50% on my investment) from the amount that I've paid them and then it pays out the balance to me, which means that I've made zero profit. This is completely unacceptable. Never again.