Thanks, I've tried that again but seems they're still investigating this issue since 2021:
Currently, we are upgrading our system and therefore such glitches are happening, and you are unable to login and are unable to view the transactions on your account. Please be advised that this is a common issue faced by all our members.
I would like to assure you that these points are added to your total account balance. I can assure the same as we have access to the database and can view all your transactions.
Also, it might take some time for the transactions to be visible as our IT team is constantly working on improving the same.
Further, regarding your tier points query, I would like to advise that the 30 tier points which you earned last year lapsed in your tier renewal cycle which ended on 31 March 2022. 20 tier points which you earned recently are correctly showing on your account.
I also don't understand this mysterious Renewal Cycle date when I have been Red this year and last anyway - I assumed according to their website the Upgrade Cycle applies as below. Maybe it has something to do with the bug a few weeks back where the TP total showed the lifetime total by mistake, thought I was Silver, then reset to zero. This Renewal Cycle should only apply from the date I become Silver - not as a Red member with no status?
"Your Upgrade Cycle is calculated from the current date of the month, to the 1st day of the same month in the previous year.”