Vodafone India — Embarrassing customers even the payment is paid before the due date

The issue is going since months. Vodfgone so called service provider is telling that they havet recieved the payment for 2000. Which was already paid before the due date . Also have provided the bank confirmation that the vtransacton was succefully gone to service provider . still they are embarrising and bugging . even n no of times i recieved a apology from customer care that the payemnt will be updated and again after two days they send me mails for bill not paid. This is really sad to see how vodafaone is embarrising customers. when mistake is from their payment department .