Hi stylishlalit,
there will be a risk if you do Bpay on monday morning you won't get accepted
isnt it you who suggest me in this post to submit spp by cheque? i think this is safer than bpay in your case
http://hotcopper.com.au/post_single.asp?fid=1&tid=2258919&msgid=13412232#.U4Uor_mSyCk