Avoid at all costs

Arrived in Johannesburg on BA flight 0057 from London on 19 September. No luggage arrived for me and my infant son (with formula) as well as about 70 other passengers. No information given about what limits would be put on expenses. Only vague wording on the website of “toiletries and essentials”. Took 3 days as well as follow up calls and emails to colossalaviation and MRK (the useless third party contractors) to eventually get my bag back. I submitted all receipts etc for claims on 24 September and to date have had no information about being paid for these expenses. Just more vague wording if we will get to you when we can as we’re very busy. Have followed up with 2 messages and also more vague wording of high call volumes, thanks for your contact, will contact you when we can. It is not good enough. Plain and simple. Should I wait indefinitely as their email suggests? Hmmm? Do you expect repeat business from me? Cause I assure you I will think more than twice about booking with BA.