Been paying for 1GB for 8 years only receiving 127 mbps

Getting ripped off paying for 1GB for 8 years I should get at least 900 mbps. Every time I call or chat they keep me on for hours and won’t cancel. I’ve been getting 127 Mbps for years and have screenshots and they’ve checked themselves. So I’ve been paying for something I wasn’t getting all these years and they still won’t cancel. I’ve spent over 10 hours on hold with them.