First of all, stop the bottle feeding and try to give it with the nifty cup and second of all please visit the hospital at which Baby was delivered and consult Lactation Tatian expert

Don't get panic  keep hope ,kindly support the baby while feeding child must be looking towards you and baby tummy should be against you stomach ,hold the baby by its shoulder and support the childs back . Please don't feed on bottle it may lead to nipple confusion

Nipple syringing may help Once the nipple touches the upper palate, child will be able to suck properly Bottle feeding causes nipple confusion

May be your technique is wrong, just go to birth hospital of baby, they will explain position and attachment, if baby’s sucking is normal then give expressed milk Complete areola should be in baby’s mouth, abdomen should touch your abdomen, if position os normal then attachment might be not correct technique So once go for latching attachment