Poor customer experience

I’ve had a Netstar tracker in my car for ten years. From time to time, I’ve tested the location and it always confirms it correctly. However, I’ve had a number of car battery issues and have just discovered it’s because my Netstar tracker is draining my car battery - apparently this is a common issue. Despite me paying my premiums every month via debit order, apparently it’s my duty to call them every three years to renew the contract, and then they would have replaced the battery. This wasn’t explained to me when I took out the contract (although it’s probably in the small print); surely once every three years, it isn’t hard to proactively prompt a contract renewal or to warn customers of the risks of not renewing the Netstar contract and therefore battery. Perhaps this is all common sense for everyone else, but I assumed the tracker was working due to the location tests being accurate. I am waiting for the sales team to call me back regarding my upgrade….