Defective item still not collected

I purchased a Chelino High chair for my baby on 06/12/2018. We didn't open and use it yet as the baby was still too small, but purchased it so long as it was on special. On the evening of 16/01/2018 we opened it to assemble it, put the parts for the booste seat is incorrect and does not fit on the table. I arranged collection there and then and emediately received an sms that collection will be on 18/01/2018. This day came and went and no collection was done. Then I phoned yesterday morning (22/01/2018) to hear when collection will be. The lady first of all told me that the waybill says the customer was not available for collection on 16/01/2018 and it was rescheduled for 22/01/2018. What nonsense! I only arranged the collection on the evening of 16/01/2018 so yes, the customer was indeed not available for collection. She then promised me that collection would be 22/01/2018. At about 16:45 no collection was done as yet. I then phoned again and the lady who I then spoke to said she will contact the collection team and will either then phone me or send me a mail. No mail was send and no phone call was made AND STILL NO COLLECTION!!!! When is this going to be collected and when am I going to receive a new high chair? This is absolutely pathetic service and I am really getting very annoyed and would rather not order from TakeAlot again. I get a defective product and then they are so absolutely useless in replacing it.