Hi Ankit,
You should be able to find this job in SM37 BI_BTCH* that you mentioned even though it has been scheduled through RSA1 and once you get the job is SM37, you can go to change mode of the job by selecting from the menu job-> change and there in you can edit the start condition by removing the periodic option from the job so that the job does not repeat or you can manually specify the date and time in NO start after option.
As well as you can also check the possibility if this job is starting after some particular event/job.
Hope this helps!!