Holding not buy on the same day

holding 8 shares of bajfinance 1 month ago, today I sell 1 in CNC after 2 hours later I want to close my position but my order rejected, after rejection I place 1 share buy order in CNC and also 2nd order rejected, 
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calling call center and they say if I sell my holding will not be bought on the same day....

if I have 50 shares of bajfinance I sell  50 shares in the morning at 9.30 and bajfinance down 2 or 3 percent but I can't buy bajfinance on the same day because I sell my holding in bajfinance in the morning....
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All brokers do this or only fyers???? Can anyone help????

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