No allocation of payments by Game (RCS) - Harassing calls

I currently hold an account with Game, which account is almost 2 years old. When Game introduced their App, I continually made payments regularly and within time. However, with the introduction of the lockdown, I made contact with Game for a reduced payment for the month of March 2020. I was also subsequently advised that I can effect payments via EFT to Game/RCS nominated bank account. I subsequently made two payments one April 2020 (March 2020 - reduced installment as agreed) and one in May 2020 via EFT to Game/RCS nominated bank account using my card as reference number (also as advised), as the Game App was not operational on both occasions. However, I have since April 2020 been receiving continuous harassing calls from Game (RCS's) collection department advising that my account is in arrears, and indicating that my two payments are not reflecting. I have on numerous occasions advised that I have made these payments and provided the proof of payments to the general email address provided. I was contacted last week advising that they "think" that they have noted my payments, but that these are yet to be allocated. However, yesterday, I AGAIN received a call advising that my account is in arrears with R3000, which simply is not the case, as I had paid the two amounts, which is yet to be allocated. Could I please request that I be contacted by a Senior Manager so as to to expedite the allocation of these payments and for the harassing calls to cease? I would also suggest that you review all notes pertaining to this account.