Vegetable oil form South Africa

Hello everyone!
We need your help. We are currently trying to find reliable suppliers of vegetable oil. But so far we have only a few companies from South Africa that require at least 30% advanced payment. The problem is that we don't know anything about them. What do you think of the following companies? I would really appreciate any advice

1. Beadica Corporation
7 ESSO ROAD
MONTAGUE GARDENS IND
MINERTON 7441
Mobile: 0027837270101
Tel- 0027218368810
Fax- 0027795655361
Email: info@beadica-corporation.za.org
Reg. No 2011/060721/23

2. Bong Trading LTD
http://www.bongtradingltd.com/index.php/about-us
Skype : bong.tradingltd


3. Abby Concept Tradings
141 COMMISSIONER STREET
SUITE 2003
KINE CENTRE BUILDING
2001
Tel: (+27) 073 291 9500
: (+27) 011 047 0547
Fax:(+27) 086 511 2516
Reg:2009/189955/23

4. Company Name: KM & TAMO TRADING
Company Address: Pietermaritzburg 3201 Kwazulu Natal
Country: South Africa
Phone: +27 (0) 11 484 44 112 / +27 71 813 55 43
Fax: +27 (0) 862 24 9961
Email: kmandtamotrading@gmail.com
Skype name :kmand.tamotrading