Compliant for pre paid recharge

Good Day I recharged R30 with Cell C operator. As per plan, R90 air time including bonus has to come but unfortunately I received R60 airtime please look into matter and revert balance of R30 Regards RAGHU RAM ( ********** 598) Plz check below: You have successfully recharged your account with R 30.00 . You also received R 30.00 free bonus airtime to use for Cell C to Cell C calls/SMSs and Data Exp 14/04/2019 PLUS 30.00 MB free black data Exp 08/10/2019.Cell C