Tsotsobe, 40, has already been serving an eight-year ban from cricket.
CSA banned Lonwabo Tsotsobe for eight years over match fixing in a 2015 T20 Challenge Series.
Lonwabo Tsotsobe is being investigated in fixing a domestic match along with Gulam Bodi and Thami Tsolekile.
Ten South Africa A players, including star batsman Quinton de Kock, were hospitalised in Chennai on Sunday due to food poisoning.
The Proteas posted 280-6 before Lonwabo Tsotsobe (4/25) and Dale Steyn (3/17) secured an unassailable 2-0 series lead when they bowled out the pace-shy Indian batting lineup for just 146.
Vernon Philander took three for 26 in a Pakistan total of 179 all out. South Africa made heavy weather of the chase but won with 68 balls to spare, steered home by an unbeaten 48 from captain AB de Villiers.
Panesar, who is currently in Australia with England's Ashes squad, initially joined the county on loan last season after hitting the headlines for the wrong reasons.
However, after joining Essex for the remainder of the domestic season, Monty Panesar called the England management to apologise for his behaviour and was rewarded with an international recall.
Gambhir has had a very poor county stint so far having scored only one century (vs Gloucestershire) in five first-class games having failed to score a 50 in the other matches. His sequence of scores in first-class games reads: 31, 0 & 106, 36, 37 and 3.
Gambhir's stint with Essex started only last month but he failed to make much impact with scores of 31, 21, 2 and 0 before striking a hundred on August 30 against Gloucestershire in a drawn match in Bristol.