Canara Bank — updating new mobile number for continuing canmobile operation

Address:

500047

Since many years i have been using canmobile app, being one of your oldest customer with a/c. No:[protected] against registered mobile no. [protected].
On 08.10.2017, i changed my mobile set and approached my branch bank at mettuguda, secunderabad for registration of new mobile no. [protected] in place of [protected].
The branch bank promptly made necessary changes for registration of new no. This was completed by around 16.00 hours on 11.10.2017.
As the otp validation was not forthcoming, i approached the customer helpline on the same day. They replied that the new number was not updated yet.
Since then, i rang up the help line about 7times by the time 17.50hrs/12.10.2017 without fruitful result.
Does it take more than 24 hours for updating a mere cell no. For validation to operate canmobile?
Please look into this issue and help.