Nightmare service and no remorse whatsoever for their lack of customer care

I send a parcel to the UK using post office courier services on the 05/05/2018. I was told it will take 2 weeks to arrive. After a month I went back to the branch (quagga center) because the parcel had not yet arrived and I was told that the parcel is still being cleared by customs in the UK (even thou the parcel tracking information only ends when it was received in Johannesburg). I went to ask them to help me track and trace for weeks which turned to months and now years and for the first year I got the same answer. The next they lost the parcel. They send me from pillar to post. Ultimately they said I should have complained within the first month and now the time had lapsed. I continued to fight with them and last year the person I was sending parcel to lost patience with me started threatening me and having other people to call me as well because she said I ****med her and therefore wanted her money back. I had to refund her for courier and the goods last month. I paid her 5k in refund which was the last money I had on me and was actually reserved for my June rent. I gave her the money because post office had promised to refund but was delayed by lockdown which was in March. So to date they still telling me stories or not responding to my emails anymore. As a result I defaulted on my June rent and now the landlord threatens to evict me.