Have I been double billed for changing my Fiber plan?

[sniper]

So, I have been using the Fiber Basic Neo (promotional plan) as a backup plan since the last 6 months at ₹530 (₹449+GST). This promotional plan was meant only for a period of 6 months, which, for me was about to end on April 30, after which the plan would have been changed to Fiber Basic OR Fiber Basic Plus.

On April 27, through the Self-care portal, I changed my plan to Fiber 449 CS378 @₹530 (₹449+GST) which is the exact price of my previous Fiber Basic Neo plan. The new plan came into effect immediately within 10 minutes & since then I have been on this plan.

Today, when I checked my bill (Bill hasn't been generated yet but the amount can be seen on the portal/My BSNL app), to my surprise, the bill amount is ₹1060, which is twice the amount of expected bill (₹530).

I was under the impression that on changing a plan the billing process is proportionate to the number of days subscribed for the different plans in a month. Has that changed lately?

Can someone help me understand why have I been doubly charged?

P.S: I don't have any outstanding amount. All bils have been paid on time.

 

[sniper]

It turns out that they charged the full bill for the current month in addition to last month's bill. Customer care said I won't be billed next month. Probably charging me one month rental in advance on changing my plan. Never experienced it previously though on changing plans.

 

[anubhav11]

It was always like this. On every plan change, 1 month security amount is charged. At the time of disconnection i had about 3.5k of security deposit.

 

[sniper]

@anubhav11 I have been a BSNL user since the last 13 years & never have I been charged a one-month security deposit in advance on changing a plan. I don't even remember the number of times I have changed plans but I've always been billed proportionally for the number of days I subscribed to different plans in a month. Maybe it's something that they started recently for Fiber plans?