Hi Nico,
You could try (at your own risk) via function module IUUC_REPL_STOP_REPLICATION direct in the SLT system, what I am not sure about is whether the table has to be in the 'replication' status in order for this to work. However, the safest way would be to open a message with SAP as they can stop the jobs for you.
I assume you are trying to create some open/cleared items queries given that you are loading the BSIS tables...perhaps a better way for HANA is to load BKPF and BSEG. You will need to use a different reading type for BSEG.
Good luck
Kris