Swindon manager Mark Cooper criticised the officials after the 2-0 defeat at Sheffield United.
Substitute Jamie Murphy scored twice as Sheffield United beat leaders Swindon 2-0.
Swindon have extended Southampton's Jack Stephens loan deal until the end of the season.
Swindon striker Miles Storey has joined League Two Newport on a one-month loan deal.
Miles Storey will not be joining Northampton after the League Two club accused Swindon of demanding too much money.
As the transfer window nears the business end, Peter Beagrie looks at the Football League strikers attracting interest.
Mark Cooper insisted his Swindon team were under par and can improve despite a 3-1 win over Chesterfield.
On-loan Chelsea midfielder John Swift inspired Swindon to a 3-1 win over Chesterfield.
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