Exchanging a shoe was a worst nightmare

Bought shoes at Spree, I have contacted customer service to exchange the shoe. The parcel was delivered at work and I was told that the courier company will fetch the exchanged shoe from work. Since I use Pargo centre, West Coast Village at times, I have received an sms advising me to drop the parcel at Pargo centre same day on the 1st November 2017. I did that since no courier company came to collect the parcel and I was looking forward to receive my shoe. Up to date I have not received my shoe and the consultant who was handling the matter does not respond to my emails nor my calls. Spree confirmed that they have not received the shoes 1st week of November, while the Pargo centre confirmed they have sent it back same day I dropped it. I do not know who to believe, I am just disappointed with Spree, they have not handled the matter very well and I am convinced that if they really wanted to know whether their service provider (Pargo) has delivered the shoe or not they could get that information. Unlike me who do not have access to their standard operating procedures. I will never buy anything from them and have requested them to delete my profile, they are so unprofessional and people must be very careful when dealing with them before they loose their monies like I did.