GPS LOG BOOK YEARLY SUBSCRIPTION FEES

I purchased a device in 2014, it is now 2019 and I have been informed that notification was sent out in 2017 that we will now be paying a yearly subscription fee as the company was taken over and they now need to make a profit. When I asked why no notification was sent out in 2018 they said they cannot answer that and it is what it is and they need to make profit. I am just confused and upset as now I must start paying for something after 4 years. I understand the new devices come with subscription fees but you cannot just change it because you need to make money and why no notification was sent in 2018. This could have been handled better, the Log book is a great online service it really is but I as an individual do all the work online and only use one service of it. If this was handled better I would have paid the Yearly subscription fee. no mention of what you get for this subscription fee. The notification was sent now a week before the payment is due? I am not very happy as to how this was handled. Not good customer service at all.