I applied for a visitor visa for my parents and sister to attend my PhD graduation in July and to visit my family for 3 weeks but they have all been refused under V4.2 (a) and (c) - see refusal letters below. Some of the reasons are simply mistakes on my part and that of my parents/sister. I am just wondering whether addressing these issues and reapplying is worth it. For instance I forgot to add my birth certificate to show that they are my parents and my parents did not add their bank statements and land/house documents because apparently they were not asked at the VAC. Is there any hope with reapplying? My graduation is on 17th July and I very much would like for them to be here and to see their grandchildren (which I also stated in the cover letter).
The relevant portions of my parents refusal letter are:


Should we go ahead and reapply now with the right documentations or is it a waste of money and hope? I feel we can easily address their issues but I do not know if that will be enough or they will come up with some other grounds. We plan on adding the land title certificate, rent income book and house valuation as evidence of my parents' ties to Ghana. Will there be grounds to say they do not earn enough money even though there is monthly pension payment for my Dad? I have a very small time window before my graduation is up.

