Update 1 May 2020:

Hoolah installment can only be used for normal priced product (non promotional item) for purchase amount minimum SGD$100. No other promotional code is allowed. Toydler have rights to cancel Hoolah installment (with 7% administration fee of the purchase amount) if amount is less than SGD $100 and/or using another promotional code. 

Please visit https://www.hoolah.co/#consumer_process for further information.