Cashback and coupons site CashKaro's Co-founder Swati Bhargava on Thursday asked digital wallet startup MobiKwik's Founder and CEO Bipin Singh for pending payments on Twitter. Bhargava tweeted, "Hi @BipinSingh Please see the mail I sent this morning. Payments are pending from @MobiKwik for 6 month now.. request your help. Thanks." The tweet was however removed by her later.