Wrong ETH to SBNB Conversion

0x4ae5da124037a0ef3f1bec50ba546c4517a6387f46a562179023d5d2e6c45ac8 this is my transaction receipt.

last 23rd of july this year, I transfered 180 usd worth of eth to sbnb, but upon checking my balance, i only received aroud 4 usd worth of sbnb, how can this happen? please can anyone tell me what should I do?