Mr. Karthik,
My view is
Basically Pursuant provisions of Section 62(3) of the Companies Act 2013 the unsecured loans can be converted in to share capital.
But at the time of obtaining the loan it should have been approved by special resolution mentioning terms & conditions that the loan shall be converted in to equity capital at a future date.
If that special resolution was not passed by your company at the time of obtaining loan, the same cannot converted under section 62(3).
Regarding treating the loan as Deposit :Recent MCA circular no 5/2015 dated 30.03.2015 clarified that amounts received by private companies from their members, directors or their relatives prior to 1st April, 2014 shall be considered as deposits under the Companies Act, 2013 such amounts received by private companies prior to 1st April, 2014 shall not be treated as 'deposits' under the Companies Act,2013 and Companies (Acceptance of Deposits) Rules, 2014 subject to the condition that relevant private company shall disclose, in the notes to its financial statement for the financial year commencing on or after lsi April, 2014 the figure of such amounts and the accounting head in which such amounts have been shown in the fi nancial statement.
Regarding conversion of share application money in to Equity you may check MCA Companies (Acceptance of Deposits ) Amendment Rules 2015 dated 31.03.2015 Amendment made to Rule 2(1) (c) (vii) (a).