Request to remove comment of phone number

I've been a NatWest customer for nearly 50 years. Recently, they kept sending me forms demanding my name and address finally threatening to close my account if I didn't provide the information they'd had for all of those 50 years! Grudgingly I filled in their form with the just my name and address. Then of course, as I'd suspected all along, the nuisance phone calls from these market research clowns - "We're phoning from NatWest's market research department" - started. Three in 2 days. The number's now blocked. Goodbye 01233648537