OK here is the problem when converting an MPL with 1500 hours to a full ATPL it might be possible BUT I doubt you will have the skill requirements according to the 'traditional' GCAA ATPL which follows ICAO guidelines and airlines worldwide will raise an eyebrow to this
All of your time is co-pilot (at least a huge chunk of it) you need at least 250 hours of PIC time in order to get a full ATPL - This is pretty difficult considering ABY does not offer PIC under supervision (I know very few airlines that actually do it)
Theses are the Requirments as per the traditional ATPL :
The applicant shall have completed in aeroplanes not less than 250 hours, either as pilot-in-command, or made up by not less than 100 hours as pilot- in-command and the necessary additional flight time as co-pilot performing under the supervision of a pilot-in-command, the duties and functions of a pilot-in-command, providing the method of supervision employed is satisfactory to the GCAA.
(c) The applicant shall have completed not less than 1500 hours of flight time as a pilot of aeroplanes, including at least-
(1) 500 hours as pilot-in-command under supervision or 250 hours, either as pilot-in-command, or made up by not less than 70 hours as pilot-in- command and the necessary additional flight time as pilot-in- command under supervision;
(2) 200 hours of cross-country flight time, of which not less than 100 hours shall be as pilot-in-command or as pilot-in-command under supervision;
(3) 100 hours of night flight time as pilot-in-command or as co-pilot; and
(4) 75 hours of actual or simulated instrument time, of which not more than 30 hours may be instrument ground time.