Cododd y cwestiwn hwn nol yn 2009. Tybed gafodd rhywun weledigaeth ynglyn a'r gair gorau am 'slamming'?
Slamming is a form of mis-selling, where fixed-line telephone customers are switched from one company to another without their express knowledge and consent
Diolch ymlaen llaw am unrhyw awgrym
GN
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