modify a prestashop module

i'm looking for a modification on one module that i bought called "deliverydays" the module allows to select the customer the day and shipping time range I can select the days, block them and select them as i want I can also add as many time ranges as I want. Currently I have two hourly ranges 12 to 16 and 18 to 21hs the client can select to receive the day of the week that he wants, in the hourly range that he likes. I need to be able to select which day of the week is enabled a tour or not, In this moment the two ranges are enabled to all days, at this moment the module is working this way Monday - 12hs to 16hs and 18hs to 21hs Tuesday - 12hs to 16hs and 18hs to 21hs Wednesday - 12hs to 16hs and 18hs to 21hs Thursday - 12hs to 16hs and 18hs to 21hs Friday - 12hs to 16hs and 18hs to 21hs Saturday - blocked Sunday - blocked what i need is this Monday - 12hs to 16hs and 18hs to 21hs Tuesday - 12hs to 16hs Wednesday - 12hs to 16hs and 18hs to 21hs Thursday - 12hs to 16hs Friday - 12hs to 16hs and 18hs to 21hs Saturday - blocked Sunday - blocked i hope you understand, thanks!