Hi Nelius. I think you will need to contact Admin for some help with merging your own profiles (info @ wikitree.com). There may be some problems with your other family members as well. For example, the ID you list for your father shows as invalid. I suspect that the problem is that the surnames Cronje and Cronjé are two different names -- the accented e is a different character from plain e, and you'll need to be consistent about which form you use in your family.
Edit to add: To address your question, Cronjé-414 is showing as an active member, but is an orphaned profile ahowing a death date in 2006. If that is your father, you can adopt the profile, but if there is an account in that name you should ask admin to straighten that out as well.